The Mutt E-Mail Client
  by Michael Elkins <me@cs.hmc.edu>
  v0.89, 26 January 1998

  ``All mail clients suck.  This one just sucks less.'' -me, circa 1995

  1.  Introduction

  Mutt is a small but very powerful text-based MIME mail client.  Mutt
  is highly configurable, and is well suited to the mail power user with
  advanced features like key bindings, keyboard macros, mail threading,
  regular expression searches and a powerful pattern matching language
  for selecting groups of messages.

  1.1.  Mutt Home Page

  http://www.cs.hmc.edu/~me/mutt/index.html

  1.2.  Mailing Lists

  To subscribe to one of the following mailing lists, send a message
  with the word subscribe in the subject to list-name-
  request@cs.hmc.edu.

  o  mutt-announce@cs.hmc.edu -- low traffic list for announcements

  o  mutt-users@cs.hmc.edu -- help, bug reports and feature requests

  o  mutt-dev@cs.hmc.edu -- development mailing list

  Note: all messages posted to mutt-announce are automatically forwarded
  to mutt-users, so you do not need to be subscribed to both lists.

  1.3.  Software Distribution Sites

  o  ftp://ftp.cs.hmc.edu/pub/me/mutt/

  1.4.  IRC

  Visit channel #mutt on DALnet (www.dal.net) to chat with other people
  interested in Mutt.

  1.5.  Copyright

  Mutt is Copyright (C) 1996-8 Michael R. Elkins <me@cs.hmc.edu>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at
  your option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  2.  Getting Started

  This section is intended as a brief overview of how to use Mutt.
  There are many other features which are described elsewhere in the
  manual.  There is even more information available in the Mutt FAQ and
  various web pages.  See the Mutt Page for more details.

  The keybindings described in this section are the defaults as
  distributed.  Your local system administrator may have altered the
  defaults for your site.  You can always type ``?'' in any menu to
  display the current bindings.

  The first thing you need to do is invoke mutt, simply by typing mutt
  at the command line.  There are various command-line options, see
  either the mutt man page or the ``reference''.

  2.1.  Moving Around in Menus

  Information is presented in menus, very similar to ELM.  Here is a
  table showing the common keys used to navigate menus in Mutt.

       j or Down       next-entry      move to the next entry
       k or Up         previous-entry  move to the previous entry
       z or PageDn     page-down       go to the next page
       Z or PageUp     page-up         go to the previous page
       = or Home       first-entry     jump to the first entry
       * or End        last-entry      jump to the last entry
       q               quit            exit the current menu
       ?               help            list all keybindings for the current menu

  2.2.  Editing Input Fields

  Mutt has a builtin line editor which is used as the primary way to
  input textual data such as email addresses or filenames.  The keys
  used to move around while editing are very similar to those of Emacs.

       ^A or <Home>    bol             move to the start of the line
       ^B or <Left>    backward-char   move back one char
       ^D or <Delete>  delete-char     delete the char under the cursor
       ^E or <End>     eol             move to the end of the line
       ^F or <Right>   forward-char    move forward one char
       ^K              kill-eol        delete to the end of the line
       ^U              kill-line       delete entire line
       ^W              kill-word       kill the word in front of the cursor
       <Up>            history-up      recall previous string from history
       <Down>          history-down    recall next string from history
       <BackSpace>     backspace       kill the char in front of the cursor
       ^G              n/a             abort
       <Tab>           n/a             complete filename (only when prompting for a file)
       <Return>        n/a             finish editing

  You can remap the editor functions using the ``bind'' command.  For
  example, to make the Delete key delete the character in front of the
  cursor rather than under, you could use

  bind editor delete backspace

  2.3.  Reading Mail - The Index and Pager

  Similar to many other mail clients, there are two modes in which mail
  is read in Mutt.  The first is the index of messages in the mailbox,
  which is called the ``index'' in Mutt.  The second mode is the display
  of the message contents.  This is called the ``pager.''

  The next few sections describe the functions provided in each of these
  modes.

  2.3.1.  The Message Index

       c               change to a different mailbox
       ESC c           change to a folder in read-only mode
       C               copy the current message to another mailbox
       ESC C           decode a message and copy it to a folder
       ESC s           decode a message and save it to a folder
       D               delete messages matching a pattern
       d               delete the current message
       F               mark as important
       l               show messages matching a pattern
       N               mark message as new
       o               change the current sort method
       O               reverse sort the mailbox
       q               save changes and exit
       s               save-message
       t               toggle the tag on a message
       ESC t           toggle tag on entire message thread
       u               undelete-message
       v               view-attachments
       x               abort changes and exit
       <Return>        display-message
       <Tab>           jump to the next new message
       @               show the author's full e-mail address
       $               save changes to mailbox
       /               search
       ESC /           search-reverse
       ^L              clear and redraw the screen
       ^T              tag messages matching a pattern
       ^U              undelete messages matching a pattern

  2.3.1.1.  Status Flags

  In addition to who sent the message and the subject, a short summary
  of the disposition of each message is printed beside the message
  number.  Zero or more of the following ``flags'' may appear, which
  mean:

       D       message is deleted
       K       contains a PGP public key
       M       requires mailcap to view
       N       message is new
       O       message is old
       P       message is PGP encrypted
       r       message has been replied to
       S       message is PGP signed
       !       message is flagged
       *       message is tagged

  Some of the status flags can be turned on or off using

  o  set-flag (default: w)

  o  clear-flag (default: W)

  Furthermore, the following flags reflect who the message is addressed
  to.  They can be customized with the ``to_chars'' variable.

       +       message is to you and you only
       T       message is to you, but also to or cc'ed to others
       C       message is cc'ed to you
       F       message is from you

  2.3.2.  The Pager

  By default, Mutt uses its builtin pager to display the body of
  messages.  The pager is very similar to the Unix program less though
  not nearly as featureful.

       <Return>        go down one line
       <Space>         display the next page (or next message if at the end of a message)
       -               go back to the previous page
       n               display the next message
       ?               show keybindings
       /               search for a regular expression (pattern)
       \               toggle search pattern coloring

  In addition, many of the functions from the index are available in the
  pager, such as delete-message or copy-message (this is one advantage
  over using an external pager to view messages).

  Also, the internal pager supports a couple other advanced features.
  For one, it will accept and translate the ``standard'' nroff sequences
  for bold and underline. These sequences are a series of either the
  letter, backspace (^H), the letter again for bold or the letter,
  backspace, ``_'' for denoting underline. Mutt will attempt to display
  these in bold and underline respectively if your terminal supports
  them. If not, you can use the bold and underline ``color'' objects to
  specify a color or mono attribute for them.

  Additionally, the internal pager supports the ANSI escape sequences
  for character attributes.  Mutt translates them into the correct color
  and character settings.  The sequences Mutt supports are:

       ESC [ Ps;Ps;Ps;...;Ps m
       where Ps =
       0    All Attributes Off
       1    Bold on
       4    Underline on
       5    Blink on
       7    Reverse video on
       3x   Foreground color is x
       4x   Background color is x

       Colors are
       0    black
       1    red
       2    green
       3    yellow
       4    blue
       5    magenta
       6    cyan
       7    white

  Mutt uses these attributes for handling text/enriched messages, and
  they can also be used by an external ``autoview'' script for
  highlighting purposes.  Note: If you change the colors for your
  display, for example by changing the color associated with color2 for
  your xterm, then that color will be used instead of green.

  2.3.3.  Threaded Mode

  When the mailbox is ``sorted'' by threads, there are a few additional
  functions available in the index and pager modes.

       ^D      delete-thread           delete all messages in the current thread
       ^U      undelete-thread         undelete all messages in the current thread
       ^N      next-thread             jump to the start of the next thread
       ^P      previous-thread         jump to the start of the previous thread
       ^R      read-thread             mark the current thread as read
       ESC d   delete-subthread        delete all messages in the current subthread
       ESC u   undelete-subthread      undelete all messages in the current subthread
       ESC n   next-subthread          jump to the start of the next subthread
       ESC p   previous-subthread      jump to the start of the previous subthread
       ESC r   read-subthread          mark the current subthread as read
       ESC t   tag-thread              toggle the tag on the current thread

  See also: ``$strict_threads''.

  2.3.4.  Miscellaneous Functions

  create-alias (default: a)

  Creates a new alias based upon the current message (or prompts for a
  new one).  Once editing is complete, an ``alias'' command is added to
  the file specified by the ``$alias_file'' variable for future use.
  Note: Specifying an ``$alias_file'' does not add the aliases specified
  there-in, you must also ``source'' the file.

  display-headers (default: h)

  Toggles the weeding of message header fields specified by ``ignore''
  commands.

  enter-command (default: ``:'')

  This command is used to execute any command you would normally put in
  a configuration file.  A common use is to check the settings of
  variables, or in conjunction with ``macros'' to change settings on the
  fly.

  list-reply (default: L)

  Reply to the current or tagged message(s) by extracting any addresses
  which match the addresses given by the ``lists'' command.  Using this
  when replying to messages posted to mailing lists help avoid duplicate
  copies being sent to the author of the message you are replying to.

  pipe-message (default: |)

  Asks for an external Unix command and pipes the current or tagged
  message(s) to it.  The variables ``$pipe_decode'', ``$pipe_split'',
  ``$pipe_sep'' and ``$wait_key'' control the exact behaviour of this
  function.

  shell-escape (default: !)

  Asks for an external Unix command and executes it.  The ``$wait_key''
  can be used to control whether Mutt will wait for a key to be pressed
  when the command returns (presumably to let the user read the output
  of the command), based on the return status of the named command.

  toggle-quoted (default: T)

  The pager uses the ``$quote_regexp'' variable to detect quoted text
  when displaying the body of the message.  This function toggles the
  display of the quoted material in the message.  It is particularly
  useful when are interested in just the response and there is a large
  amount of quoted text in the way.

  2.4.  Sending Mail

  The following bindings are available in the index for sending
  messages.

  m       compose         compose a new message
  r       reply           reply to sender
  g       group-reply     reply to all recipients
  L       list-reply      reply to mailing list address
  f       forward         forward message
  b       bounce          bounce (remail) message

  Bouncing a message sends the message as is to the recipient you
  specify.  Forwarding a message allows you to add comments or modify
  the message you are forwarding.  Bouncing a message uses the
  ``sendmail_bounce'' command to send a copy of a message to recipients
  as if they were original recipients of the message.  See also
  ``$mime_fwd''.

  Mutt will then enter the compose menu and prompt you for the
  recipients to place on the ``To:'' header field.  Next, it will ask
  you for the ``Subject:'' field for the message, providing a default if
  you are replying to or forwarding a message.  See also ``$askcc'',
  ``$askbcc'', ``$autoedit'', and ``$fast_reply'' for changing how Mutt
  asks these questions.

  Mutt will then automatically start your ``$editor'' on the message
  body.  If the ``$edit_hdrs'' variable is set, the headers will be at
  the top of the message in your editor.  Any messages you are replying
  to will be added in sort order to the message, with appropriate
  ``$attribution'', ``$indent_str'' and ``$post_indent_str''.  When
  forwarding a message, if the ``$mime_fwd'' variable is unset, a copy
  of the forwarded message will be included.  If you have specified a
  ``$signature'', it will be appended to the message.

  Once you have finished editing the body of your mail message, you are
  returned to the compose menu.  The following options are available:

       a       attach-file             attach a file
       d       edit-description        edit description on attachment
       D       detach-file             detach a file
       T       edit-to                 edit the To field
       c       edit-cc                 edit the Cc field
       b       edit-bcc                edit the Bcc field
       y       send-message            send the message
       s       edit-subject            edit the Subject
       f       edit-fcc                specify an ``Fcc'' mailbox
       p       pgp-menu                select PGP options (US version only)
       P       postpone-message        postpone this message until later
       q       quit                    quit (abort) sending the message
       i       ispell                  check spelling (if available on your system)

  2.4.1.  Editing the message header

  When editing the header of your outgoing message, there are a couple
  of special features available.

  If you specify
  Fcc: filename
  Mutt will pick up filename just as if you had used the edit-fcc
  function in the compose menu.

  You can also attach files to your message by specifying
  Attach: filename  [ description ]
  where filename is the file to attach and description is an optional
  string to use as the description of the attached file.

  When replying to messages, if you remove the In-Reply-To: field from
  the header field, Mutt will not generate a References: field, which
  allows you to create a new message thread.

  Also see ``edit_hdrs''.

  2.5.  Postponing Mail

  At times it is desirable to delay sending a message that you have
  already begun to compose.  When the postpone-message function is used
  in the compose menu, the body of your message and attachments are
  stored in the mailbox specified by the ``$postponed'' variable.  This
  means that you can recall the message even if you exit Mutt and then
  restart it at a later time.

  Once a message is postponed, there are several ways to resume it.
  From the command line you can use the ``-p'' option, or if you compose
  a new message from the index or pager you will be prompted if
  postponed messages exist.  If multiple messages are currently
  postponed, the postponed menu will pop up and you can select which
  message you would like to resume.

  Note: If you postpone a reply to a message, the reply setting of the
  message is only updated when you actually finish the message and send
  it.  Also, you must be in the same folder with the message you replied
  to for the status of the message to be updated.

  See also the ``$postpone'' quad-option.

  3.  Configuration

  While the default configuration (or ``preferences'') make Mutt usable
  right out of the box, it is often desirable to tailor Mutt to suit
  your own tastes.  When Mutt is first invoked, it will attempt to read
  the ``system'' configuration file (defaults set by your local system
  administrator), unless the ``-n'' ``command line'' option is
  specified.  This file is typically /usr/local/share/Muttrc or
  /usr/local/lib/Muttrc.  Next, it looks for a file in your home
  directory named .muttrc.  In this file is where you place ``commands''
  to configure Mutt.

  In addition, mutt supports version specifc configuration files that
  are parsed instead of the default files as explained above.  For
  intance, if your system has a Muttrc-0.88 file in the system
  configuration directory, and you are running version 0.88 of mutt,
  this file will be sourced instead of the Muttrc file.  The same is
  true of the user configuration file, if you have a file .muttrc-0.88.6
  in your home directory, when you run mutt version 0.88.6, it will
  source this file instead of the default .muttrc file.  The version
  number is the same which is visible using the ``-v'' ``command line''
  switch or using the show-version key (default: V) from the index menu.

  3.1.  Syntax of Initialization Files

  An initialization file consists of a series of ``commands'', each on
  its own line. The hash mark, or pound sign (``#''), is used as a
  ``comment'' character. You can use it to annotate your initialization
  file. All text after the comment character to the end of the line is
  ignored. For example,

       my_hdr X-Disclaimer: Why are you listening to me? # This is a comment

  Single quotes (') and double quotes (") can be used to quote strings
  which contain spaces or other special characters.  The difference
  between the two types of quotes is similar to that of many popular
  shell programs, namely that a single quote is used to specify a
  literal string (one that is not interpreted for shell variables or
  quoting with a backslash [see next paragraph]), while double quotes
  indicate a string for which should be evaluated.  For example,
  backtics are evaluated inside of double quotes, but not for single
  quotes.

  \ quotes the next character, just as in shells such as bash and zsh.
  For example, if want to put quotes ``"'' inside of a string, you can
  use ``\'' to force the next character to be a literal instead of
  interpreted character.

       set realname="Michael \"MuttDude\" Elkins"

  ``\\'' means to insert a literal ``\'' into the line.  ``\n'' and
  ``\r'' have their usual C meanings of linefeed and carriage-return,
  respectively.

  A \ at the end of a line can be used to split commands over multiple
  lines, provided that the split points don't appear in the middle of
  command names.

  It is also possible to substitute the output of a Unix command in an
  initialization file.  This is accomplished by enclosing the command in
  backquotes (``).  For example,

       my_hdr X-Operating-System: `uname -a`

  The output of the Unix command ``uname -a'' will be substituted before
  the line is parsed.  Note that since initialization files are line
  oriented, only the first line of output from the Unix command will be
  substituted.

  For a complete list of the commands understood by mutt, see the
  ``command reference''.

  3.2.  Defining/Using aliases

  Usage: alias key address [ , address, ... ]

  It's usually very cumbersome to remember or type out the address of
  someone you are communicating with.  Mutt allows you to create
  ``aliases'' which map a short string to a full address.

  Note: if you want to create an alias for a group (by specifying more
  than one address), you must separate the addresses with a comma
  (``,'').

  To remove an alias or aliases:

  unalias addr [ addr ... ]

       alias muttdude me@cs.hmc.edu (Michael Elkins)
       alias theguys manny, moe, jack

  Unlike other mailers, Mutt doesn't require aliases to be defined in a
  special file.  The alias command can appear anywhere in a
  configuration file, as long as this file is ``sourced''.
  Consequently, you can have multiple alias files, or you can have all
  aliases defined in your muttrc.

  On the other hand, the ``create-alias'' function can use only one
  file, the one pointed to by the ``$alias_file'' variable (which is
  ~/.muttrc by default). This file is not special either, in the sense
  that Mutt will happily append aliases to any file, but in order for
  the new aliases to take effect you need to explicitely ``source'' this
  file too.

  For example:

       source /usr/local/share/Mutt.aliases
       source ~/.mail_aliases
       set alias_file=~/.mail_aliases

  To use aliases, you merely use the alias at any place in mutt where
  mutt prompts for addresses, such as the To: or CC: prompt.  You can
  also enter aliases in your editor at the appropirate headers if you
  have the ``$edit_hdrs'' variable set.

  In addition, at the various address prompts, you can use the tab
  character to expand a partial alias to the full alias.  If there are
  multiple matches, mutt will bring up a menu with the matching aliases.
  In order to be presented with the full list of aliases, you must hit
  tab with out a partial alias, such as at the beginning of the prompt
  or after a comma denoting multiple addresses.

  In the alias menu, you can select as many aliases as you want with the
  select-entry key (default: RET), and use the exit key (default: q) to
  return to the address prompt.

  3.3.  Changing the default key bindings

  Usage: bind map key function

  This command allows you to change the default key bindings (operation
  invoked when pressing a key).

  map specifies in which menu the binding belongs.  The currently
  defined maps are:

  o  generic

  o  alias

  o  attach

  o  browser

  o  editor

  o  index

  o  compose

  o  pager

  o  pgp

  o  url

  key is the key (or key sequence) you wish to bind.  To specify a
  control character, use the sequence \Cx, where x is the letter of the
  control character (for example, to specify control-A use ``\Ca'').
  Note that the case of x as well as \C is ignored, so that \CA, \Ca,
  \cA and \ca are all equivalent.  An alternative form is to specify the
  key as a three digit octal number prefixed with a ``\'' (for example
  \177 is equivalent to \c?).

  In addition, key may consist of:

       \t              tab
       \r              carriage return
       \n              newline
       \e              escape
       up              up arrow
       down            down arrow
       left            left arrow
       right           right arrow
       pageup          Page Up
       pagedown        Page Down
       backspace       Backspace
       delete          Delete
       insert          Insert
       enter           Enter
       home            Home
       end             End
       f1              function key 1
       f10             function key 10

  key does not need to be enclosed in quotes unless it contains a space
  (`` '').

  function specifies which action to take when key is pressed.  For a
  complete list of functions, see the ``reference''.  The special
  function noop unbinds the specify key sequence.

  3.4.  Setting variables based upon mailbox

  Usage: folder-hook [!]pattern command

  It is often desirable to change settings based on which mailbox you
  are reading.  The folder-hook command provides a method by which you
  can execute any configuration command.  pattern is a regular
  expression specifying in which mailboxes to execute command before
  loading.  If a mailbox matches multiple folder-hook's, they are
  executed in the order given in the muttrc.

  Note: if you use the ``!'' shortcut for ``$spoolfile'' at the
  beginning of the pattern, you must place it inside of double or single
  quotes in order to distinguish it from the logical not operator for
  the expression.

  Note that the settings are not restored when you leave the mailbox.
  For example, a command action to perform is to change the sorting
  method based upon the mailbox being read:

       folder-hook mutt set sort=threads

  However, the sorting method is not restored to its previous value when
  reading a different mailbox.  To specify a default command, use the
  pattern ``.'':

       folder-hook . set sort=date-sent

  3.5.  Keyboard macros

  Usage: macro menu key sequence

  Macros are useful when you would like a single key to perform a series
  of actions.  When you press key in menu menu, Mutt will behave as if
  you had typed sequence.  So if you have a common sequence of commands
  you type, you can create a macro to execute those commands with a
  single key.

  key and sequence are expanded by the same rules as the ``key
  bindings'', with the addition that control characters in sequence can
  also be specified as ^x.  In order to get a caret (``^'') you need to
  use ^^.

  Note: Macro definitions (if any) listed in the help screen(s), are
  silently truncated at the screen width, and are not wrapped.

  3.6.  Using color and mono video attributes

  Usage: color object foreground background [ regexp ]

  If your terminal supports color, you can spice up Mutt by creating
  your own color scheme.  To define the color of an object (type of
  information), you must specify both a foreground color and a
  background color (it is not possible to only specify one or the
  other).

  object can be one of:

  o  attachment

  o  body (match regexp in the body of messages)

  o  bold (hiliting bold patterns in the body of messages)

  o  error (error messages printed by Mutt)

  o  header (match regexp in the message header)

  o  hdrdefault (default color of the message header in the pager)

  o  indicator (arrow or bar used to indicate the current item in a
     menu)

  o  markers (the ``+'' markers at the beginning of wrapped lines in the
     pager)

  o  message (informational messages)

  o  normal

  o  quoted (text matching ``$quote_regexp'' in the body of a message)

  o  quoted1, quoted2, ..., quotedN (higher levels of quoting)

  o  search (hiliting of words in the pager)

  o  signature

  o  status (mode lines used to display info about the mailbox or
     message)

  o  tilde (the ``~'' used to pad blank lines in the pager)

  o  tree (thread tree drawn in the message index and attachment menu)

  o  underline (hiliting underlined patterns in the body of messages)

  foreground and background can be one of the following:

  o  white

  o  black

  o  green

  o  magenta

  o  blue

  o  cyan

  o  yellow

  o  red

  o  default

  o  colorx

  foreground can optionally be prefixed with the keyword bright to make
  the foreground color boldfaced (e.g., brightred).

  If your terminal supports it, the special keyword default can be used
  as a transparent color.  The value brightdefault is also valid.  If
  Mutt is linked against the S-Lang library, you also need to set the
  COLORFGBG environment variable to the default colors of your terminal
  for this to work; for example (for Bourne-like shells):

       set COLORFGBG="green;black"
       export COLORFGBG

  Note: The S-Lang library requires you to use the lightgray and brown
  keywords instead of white and yellow when setting this variable.

  Mutt also recognizes the keywords color0, color1, ..., colorN-1 (N
  being the number of colors supported by your terminal).  This is
  useful when you remap the colors for your display (for example by
  changing the color associated with color2 for your xterm), since color
  names may then lose their normal meaning.

  If your terminal does not support color, it is still possible change
  the video attributes through the use of the ``mono'' command:

  Usage: mono <object> <attribute> [ regexp ]

  where attribute is one of the following:

  o  none

  o  bold

  o  underline

  o  reverse

  o  standout

  3.7.  Ignoring (weeding) unwanted message headers

  Usage: [un]ignore pattern [ pattern ... ]

  Messages often have many header fields added by automatic processing
  systems, or which may not seem useful to display on the screen.  This
  command allows you to specify header fields which you don't normally
  want to see.

  You do not need to specify the full header field name.  For example,
  ``ignore content-'' will ignore all header fields that begin with the
  pattern ``content-''.

  To remove a previously added token from the list, use the ``unignore''
  command.  Note that if you do ``ignore x-'' it is not possible to
  ``unignore x-mailer,'' for example.  The ``unignore'' command does not
  make Mutt display headers with the given pattern.

  ``unignore *'' will remove all tokens from the ignore list.

  For example:

       # Sven's draconian header weeding
       ignore *
       unignore from date subject to cc
       unignore organization organisation x-mailer: x-newsreader: x-mailing-list:
       unignore posted-to:

  3.8.  Mailing lists

  Usage: [un]lists address [ address ... ]

  Mutt has a few nice features for ``handling mailing lists''.  In order
  to take advantage of them, you must specify which addresses belong to
  mailing lists.

  It is important to note that you should never specify the domain name
  ( the part after the ``@'') with the lists command.  You should only
  specify the ``mailbox'' portion of the address (the part before the
  ``@'').  For example, if you've subscribed to the Mutt mailing list,
  you will receive mail addressed to mutt-users@cs.hmc.edu.  So, to tell
  Mutt that this is a mailing list, you would add ``lists mutt-users''
  to your initialization file.

  The ``unlists'' command is to remove a token from the list of mailing-
  lists.  Use ``unlists *'' to remove all tokens.

  3.9.  Using Multiple spool mailboxes

  Usage: mbox-hook [!]pattern mailbox

  This command is used to move read messages from a specified mailbox to
  a different mailbox automatically when you quit or change folders.
  pattern is a regular expression specifying the mailbox to treat as a
  ``spool'' mailbox and mailbox specifies where mail should be saved
  when read.

  Unlike some of the other hook commands, only the first matching
  pattern is used (it is not possible to save read mail in more than a
  single mailbox).

  3.10.  Defining mailboxes which receive mail

  Usage: mailboxes [!]filename [ filename ... ]

  This command specifies folders which can receive mail and which will
  be checked for new messages.  By default, the main menu status bar
  displays how many of these folders have new messages.

  When changing folders, pressing space will cycle through folders with
  new mail.

  Pressing TAB in the directory browser will bring up a menu showing the
  files specified by the mailboxes command, and indicate which contain
  new messages.  Mutt will automatically enter this mode when invoked
  from the command line with the -y option.

  Note: new mail is detected by comparing the last modification time to
  the last access time.  Utilities like biff or frm or any other program
  which accesses the mailbox might cause Mutt to never detect new mail
  for that mailbox if they do not properly reset the access time.

  Note: the filenames in the mailboxes command are resolved when the
  command is executed, so if these names contain ``shortcut characters''
  (such as ``='' and ``!''), any variable definition that affect these
  characters (like ``$folder'' and ``$spool'') should be executed before
  the mailboxes command.

  3.11.  User defined headers

  Usage:
  my_hdr string
  unmy_hdr field [ field ... ]

  The ``my_hdr'' command allows you to create your own header fields
  which will be added to every message you send.

  For example, if you would like to add an ``Organization:'' header
  field to all of your outgoing messages, you can put the command

       my_hdr Organization: A Really Big Company, Anytown, USA

  in your .muttrc.

  Note:  space characters are not allowed between the keyword and the
  colon (``:'').  The standard for electronic mail (RFC822) says that
  space is illegal there, so Mutt enforces the rule.

  If you would like to add a header field to a single message, you
  should either set the ``edit_hdrs'' variable, or use the edit-headers
  function (default: ``E'') in the send-menu so that you can edit the
  header of your message along with the body.

  To remove user defined header fields, use the ``unmy_hdr'' command.
  You may specify an asterisk (``*'') to remove all header fields, or
  the fields to remove.  For example, to remove all ``To'' and ``Cc''
  header fields, you could use:

       unmy_hdr to cc

  3.12.  Defining the order of headers when viewing messages

  Usage: hdr_order header1 header2 header3

  With this command, you can specify an order in which mutt will attempt
  to present headers to you when viewing messages.

       hdr_order From Date: From: To: Cc: Subject:

  3.13.  Specify default save filename

  Usage: save-hook [!]regexp filename

  This command is used to override the default filename used when saving
  messages.  filename will be used as the default filename if the
  message is From: an address matching regexp or if you are the author
  and the message is addressed to: something matching regexp.

  With no matching save-hook, Mutt first looks to see if the message was
  addressed to: or cc: one of your mailing ``lists''.  If not, the
  default filename is based upon the reply-to: or from: field if the
  message is not from yourself, otherwise the first address in the to:
  or cc: field is used.

  Examples:

       save-hook me@(turing\\.)?cs\\.hmc\\.edu$ +elkins
       save-hook aol\\.com$ +spam

  3.14.  Change settings based upon message recipients

  Usage: send-hook [!]regexp command

  This command can be used to execute arbitrary configuration commands
  based upon recipients of the message.  regexp is a regular expression
  matching the desired address.  command is executed when regexp matches
  recipients of the message.  When multiple matches occur, commands are
  executed in the order they are specified in the muttrc.

  Example: send-hook mutt "set mime_fwd signature=''"

  Another typical use for this command is to change the values of the
  ``$attribution'', ``$signature'' and ``$locale'' variables in order to
  change the language of the attributions and signatures based upon the
  recipients.

  Note: the send-hook's are only executed ONCE after getting the initial
  list of recipients.  Adding a recipient after replying or editing the
  message will NOT cause any send-hook to be executed.

  3.15.  Specify default Fcc: mailbox when composing

  Usage: fcc-hook [!]regexp mailbox

  This command is used to save outgoing mail in a mailbox other than
  ``$record''.  Mutt searches the initial list of message recpients for
  the first matching regexp and uses mailbox as the default Fcc:
  mailbox.  If no match is found the message will be saved to
  ``$record'' mailbox.

  Example: fcc-hook aol.com$ +spammers

  The above will save a copy of all messages going to the aol.com domain
  to the `+spammers' mailbox by default.

  3.16.  Adding key sequences to the keyboard buffer

  Usage: push string

  This command adds the named string to the keyboard buffer.  You may
  use it to automatically run a sequence of commands at startup, or when
  entering certain folders.

  3.17.  Setting variables

  Usage: set [no|inv]variable[=value] [ variable ... ]
  Usage: toggle variable [variable ... ]
  Usage: unset variable [variable ... ]

  This command is used to set (and unset) ``configuration variables''.
  There are four basic types of variables: boolean, number, string and
  quadoption.  boolean variables can be set (true) or unset (false).
  number variables can be assigned a positive integer value.

  string variables consist of any number of printable characters.
  strings must be enclosed in quotes if they contain spaces or tabs.
  You may also use the ``C'' escape sequences \n and \t for newline and
  tab, respectively.

  quadoption variables are used to control whether or not to be prompted
  for certain actions, or to specify a default action.  A value of yes
  will cause the action to be carried out automatically as if you had
  answered yes to the question.  Similarly, a value of no will cause the
  the action to be carried out as if you had answered ``no.''  A value
  of ask-yes will cause a prompt with a default answer of ``yes'' and
  ask-no will provide a default answer of ``no.''

  Prefixing a variable with ``no'' will unset it.  Example: set
  noaskbcc.

  For boolean variables, you may optionally prefix the variable name
  with inv to toggle the value (on or off).  This is useful when writing
  macros.  Example: set invsmart_wrap.

  The toggle command automatically prepends the inv prefix to all
  specified variables.

  The unset command automatically prepends the no prefix to all
  specified variables.

  Using the enter-command function in the index menu, you can query the
  value of a variable by prefixing the name of the variable with a
  question mark:

       set ?allow_8bit

  The question mark is actually only required for boolean variables.

  3.18.  Reading initialization commands from another file

  Usage: source filename

  This command allows the inclusion of initialization commands from
  other files.  For example, I place all of my aliases in
  ~/.mail_aliases so that I can make my ~/.muttrc readable and keep my
  aliases private.

  If the filename begins with a tilde (``~''), it will be expanded to
  the path of your home directory.

  4.  Advanced Usage

  4.1.  Searching and Regular Expressions

  All text patterns for searching and matching in Mutt must be specified
  as regular expressions (regexp) in the ``POSIX extended'' syntax
  (which is more or less the syntax used by egrep and GNU awk).  For
  your convenience, we have included below a brief description of this
  syntax.

  The search is case sensitive if the pattern contains at least one
  upper case letter, and case insensitive otherwise. Note that ``\''
  must be quoted if used for a regular expression in an initialization
  command: ``\\''.  For more information, see the section on
  ``searching'' below.

  4.1.1.  Regular Expressions

  A regular expression is a pattern that describes a set of strings.
  Regular expressions are constructed analagously to arithmetic
  expressions, by using various operators to combine smaller
  expressions.

  The fundamental building blocks are the regular expressions that match
  a single character.  Most characters, including all letters and
  digits, are regular expressions that match themselves.  Any
  metacharacter with special meaning may be quoted by preceding it with
  a backslash.

  The period ``.'' matches any single character.  The caret ``^'' and
  the dollar sign ``$'' are metacharacters that respectively match the
  empty string at the beginning and end of a line.

  A list of characters enclosed by ``['' and ``]'' matches any single
  character in that list; if the first character of the list is a caret
  ``^'' then it matches any character not in the list.  For example, the
  regular expression [0123456789] matches any single digit.  A range of
  ASCII characters may be specified by giving the first and last
  characters, separated by a hyphen ``-''.  Most metacharacters lose
  their special meaning inside lists.  To include a literal ``]'' place
  it first in the list.  Similarly, to include a literal ``^'' place it
  anywhere but first.  Finally, to include a literal hyphen ``-'' place
  it last.

  Certain named classes of characters are predefined.  Character classes
  consist of ``[:'', a keyword denoting the class, and ``:]''.  The
  following classes are defined by the POSIX standard:

     [:alnum:]
        Alphanumeric characters.

     [:alpha:]
        Alphabetic characters.

     [:blank:]
        Space or tab characters.

     [:cntrl:]
        Control characters.

     [:digit:]
        Numeric characters.

     [:graph:]
        Characters that are both printable and visible.  (A space is
        printable, but not visible, while an ``a'' is both.)

     [:lower:]
        Lower-case alphabetic characters.

     [:print:]
        Printable characters (characters that are not control
        characters.)

     [:punct:]
        Punctuation characters (characters that are not letter, digits,
        control characters, or space characters).

     [:space:]
        Space characters (such as space, tab and formfeed, to name a
        few).

     [:upper:]
        Upper-case alphabetic characters.

     [:xdigit:]
        Characters that are hexadecimal digits.

  A character class is only valid in a regular expression inside the
  brackets of a character list.  Note that the brackets in these class
  names are part of the symbolic names, and must be included in addition
  to the brackets delimiting the bracket list.  For example, [[:digit:]]
  is equivalent to [0-9].

  Two additional special sequences can appear in character lists.  These
  apply to non-ASCII character sets, which can have single symbols
  (called collating elements) that are represented with more than one
  character, as well as several characters that are equivalent for
  collating or sorting purposes:

     Collating Symbols
        A collating symbols is a multi-character collating element
        enclosed in ``[.'' and ``.]''.  For example, if ``ch'' is a
        collating element, then [[.ch.]] is a regexp that matches this
        collating element, while [ch] is a regexp that matches either
        ``c'' or ``h''.

     Equivalence Classes
        An equivalence class is a locale-specific name for a list of
        characters that are equivalent. The name is enclosed in ``[=''
        and ``=]''.  For example, the name ``e'' might be used to
        represent all of ``e'' ``e'' and ``e''.  In this case, [[=e=]]
        is a regexp that matches any of ``e'', ``e'' and ``e''.

  A regular expression matching a single character may be followed by
  one of several repetition operators:

     ?  The preceding item is optional and matched at most once.

     *  The preceding item will be matched zero or more times.

     +  The preceding item will be matched one or more times.

     {n}
        The preceding item is matched exactly n times.

     {n,}
        The preceding item is matched n or more times.

     {,m}
        The preceding item is matched at most m times.

     {n,m}
        The preceding item is matched at least n times, but no more than
        m times.

  Two regular expressions may be concatenated; the resulting regular
  expression matches any string formed by concatenating two substrings
  that respectively match the concatenated subexpressions.

  Two regular expressions may be joined by the infix operator ``|''; the
  resulting regular expression matches any string matching either
  subexpression.

  Repetition takes precedence over concatenation, which in turn takes
  precedence over alternation.  A whole subexpression may be enclosed in
  parentheses to override these precedence rules.

  Note: If you compile Mutt with the GNU rx package, the following
  operators may also be used in regular expressions:

     \y Matches the empty string at either the beginning or the end of a
        word.

     \B Matches the empty string within a word.

     \< Matches the empty string at the beginning of a word.

     \> Matches the empty string at the end of a word.

     \w Matches any word-constituent character (letter, digit, or
        underscore).

     \W Matches any character that is not word-constituent.

     \` Matches the empty string at the beginning of a buffer (string).

     \' Matches the empty string at the end of a buffer.

  Please note however that these operators are not defined by POSIX, so
  they may or may not be available in stock libraries on various
  systems.

  4.1.2.  Searching

  Many of Mutt's commands allow you to specify a pattern to match
  (limit, tag-pattern, delete-pattern, etc.).  There are several ways to
  select messages:

  ~b PATTERN      messages which contain PATTERN in the message body
  ~c USER         messages carbon-copied to USER
  ~d [MIN]-[MAX]  messages with ``date-sent'' in a Date range
  ~e PATTERN      message which contains PATTERN in the ``Sender'' field
  ~f USER         messages originating from USER
  ~h PATTERN      messages which contain PATTERN in the message header
  ~i ID           message which match ID in the ``Message-ID'' field
  ~m [MIN]-[MAX]  message in the range MIN to MAX
  ~r [MIN]-[MAX]  messages with ``date-received'' in a Date range
  ~s SUBJECT      messages having SUBJECT in the ``Subject'' field.
  ~t USER         messages addressed to USER
  ~A              all messages
  ~D              deleted messages
  ~F              flagged messages
  ~N              new messages
  ~O              old messages
  ~R              read messages
  ~Q              messages which have been replied to
  ~T              tagged messages
  ~U              unread messages

  Where PATTERN, USER, ID, and SUBJECT are ``regular expressions''.

  4.1.3.  Complex Searches

  Logical AND is performed by specifying more than one criterion.  For
  example:

       ~t mutt ~f elkins

  would select messages which contain the word ``mutt'' in the list of
  recipients and that have the word ``elkins'' in the ``From'' header
  field.

  Mutt also recognizes the following operators to create more complex
  search patterns:

  o  ! -- logical NOT operator

  o  | -- logical OR operator

  o  () -- logical grouping operator

  Here is an example illustrating a complex search pattern.  This
  pattern will select all messages which do not contain ``mutt'' in the
  ``To'' or ``Cc'' field and which are from ``elkins''.

       !(~t mutt|~c mutt) ~f elkins

  4.1.4.  Searching by Date

  All dates must be in DD/MM/YY format (month and year are optional,
  defaulting to the current month and year).  An example of a valid
  range of dates is:

       Limit to messages matching: ~d 20/1/95-31/10

  If you omit the minimum (first) date, and just specify ``-DD/MM/YY'',
  all messages before the given date will be selected.  If you omit the
  maximum (second) date, and specify ``DD/MM/YY-'', all messages after
  the given date will be selected.  If you specify a single date with no
  dash (``-''), only messages sent on the given date will be selected.

  Note: all dates used when searching are relative to the local time
  zone, so unless you change the setting of your ``$hdr_format'' to
  include a %[...] format, these are not the dates shown in the main
  index.

  4.2.  Using Tags

  Sometimes it is desirable to perform an operation on a group of
  messages all at once rather than one at a time.  An example might be
  to save messages to a mailing list to a separate folder, or to delete
  all messages with a given subject.  To tag all messages matching a
  pattern, use the tag-pattern function, which is bound to ``control-T''
  by default.  Or you can select individual messages by hand using the
  ``tag-message'' function, which is bound to ``t'' by default.  See
  ``searching'' for Mutt's searching syntax.

  Once you have tagged the desired messages, you can use the ``tag-
  prefix'' operator, which is the ``;'' (semicolon) key by default.
  When the ``tag-prefix'' operator is used, the next operation will be
  applied to all tagged messages if that operation can be used in that
  manner.  If the ``$auto_tag'' variable is set, the next operation
  applies to the tagged messages automatically, without requiring the
  ``tag-prefix''.

  4.3.  Mailbox Formats

  Mutt supports reading and writing of four different mailbox formats:
  mbox, MMDF, MH and Maildir.  The mailbox type is autodetected, so
  there is no need to use a flag for different mailbox types.  When
  creating new mailboxes, Mutt uses the default specified with the
  ``$mbox_type'' variable.

  mbox.  This is the most widely used mailbox format for UNIX.  All
  messages are stored in a single file.  Each message has a line of the
  form:

       From me@cs.hmc.edu Fri, 11 Apr 1997 11:44:56 PST

  to denote the start of a new message (this is often referred to as the
  ``From_'' line).

  MMDF.  This is a variant of the mbox format.  Each message is
  surrounded by lines containing ``^A^A^A^A'' (four control-A's).

  MH. A radical departure from mbox and MMDF, a mailbox consists of a
  directory and each message is stored in a separate file.  The filename
  indicates the message number (however, this is may not correspond to
  the message number Mutt displays). Deleted messages are renamed with a
  comma (,) prepended to the filename. Note: Mutt detects this type of
  mailbox by looking for either .mh_sequences or .xmhcache (needed to
  distinguish normal directories from MH mailboxes). Mutt does not
  update these files, yet.

  Maildir.  The newest of the mailbox formats, used by the Qmail MTA (a
  replacement for sendmail).  Similar to MH, except that it adds three
  subdirectories of the mailbox: tmp, new and cur.  Filenames for the
  messages are chosen in such a way they are unique, even when two
  programs are writing the mailbox over NFS, which means that no file
  locking is needed.

  4.4.  Mailbox Shortcuts

  There are a number of built in shortcuts which refer to specific
  mailboxes.  These shortcuts can be used anywhere you are prompted for
  a file or mailbox path.

  o  ! -- refers to your ``$spool'' (incoming) mailbox

  o  > -- refers to your ``$mbox'' file

  o  < -- refers to your ``$record'' file

  o  - -- refers to the file you've last visited

  o  ~ -- refers to your home directory

  o  = or + -- refers to your ``$folder'' directory

  4.5.  Handling Mailing Lists

  Mutt has a few configuration options that make dealing with large
  amounts of mail easier.  The first thing you must do is to let Mutt
  know what addresses you consider to be mailing lists (technically this
  does not have to be a mailing list, but that is what it is most often
  used for).  This is accomplished through the use of the ``lists''
  command in your muttrc.

  Now that Mutt knows what your mailing lists are, it can do several
  things, the first of which is the ability to show the list name in the
  index menu display.  This is useful to distinguish between personal
  and list mail in the same mailbox.  In the ``$hdr_format'' variable,
  the escape ``%L'' will return the string ``To <list>'' when ``list''
  appears in the ``To'' field, and ``Cc <list>'' when it appears in the
  ``Cc'' field (otherwise it returns the name of the author).

  Often times the ``To'' and ``Cc'' fields in mailing list messages tend
  to get quite large. Most people do not bother to remove the author of
  the message they are reply to from the list, resulting in two or more
  copies being sent to that person.  The ``list-reply'' function, which
  by default is bound to ``L'' in the index menu and pager, helps reduce
  the clutter by only replying to the mailing list addresses instead of
  all recipients.

  The other method some mailing list admins use is to generate a
  ``Reply-To'' field which points back to the mailing list address
  rather than the author of the message.  This can create problems when
  trying to reply directly to the author in private, since most mail
  clients will automatically reply to the address given in the ``Reply-
  To'' field.  Mutt uses the ``$reply_to'' variable to help decide which
  address to use.  If set, you will be prompted as to whether or not you
  would like to use the address given in the ``Reply-To'' field, or
  reply directly to the address given in the ``From'' field.  When
  unset, the ``Reply-To'' field will be used when present.

  Lastly, Mutt has the ability to ``sort'' the mailbox into ``threads''.
  A thread is a group of messages which all relate to the same subject.
  This is usually organized into a tree-like structure where a message
  and all of its replies are represented graphically.  If you've ever
  used a threaded news client, this is the same concept.  It makes
  dealing with large volume mailing lists easier because you can easily
  delete uninteresting threads and quickly find topics of value.

  4.6.  Delivery Status Notification (DSN) Support

  RFC1894 defines a set of MIME content types for relaying information
  about the status of electronic mail messages.  These can be thought of
  as ``return receipts.'' Berkeley sendmail 8.8.x currently has some
  command line options in which the mail client can make requests as to
  what type of status messages should be returned.

  To support this, there are two variables. ``$dsn_notify'' is used to
  request receipts for different results (such as failed message,
  message delivered, etc.).  ``$dsn_return'' requests how much of your
  message should be returned with the receipt (headers or full message).
  Refer to the man page on sendmail for more details on DSN.

  4.7.  POP3 Support (OPTIONAL)

  If Mutt was compiled with POP3 support (by running the configure
  script with the --enable-pop flag), it has the ability to fetch your
  mail from a remote server for local browsing.  When you invoke the
  fetch-mail function (default: G), Mutt attempts to connect to
  ``pop_host'' and authenticate by logging in as ``pop_user''.  After
  the connection is established, you will be prompted for your password
  on the remote system.

  Once you have been authenticated, Mutt will fetch all your new mail
  and place it in the local ``spoolfile''.  After this point, Mutt runs
  exactly as if the mail had always been local.

  Note: The POP3 support is there only for convenience, and it's rather
  limited.  If you need more functionality you should consider using a
  specialized program, such as fetchmail

  5.  Mutt's MIME Support

  Quite a bit of effort has been made to make Mutt the premier text-mode
  MIME MUA.  Every effort has been made to provide the functionality
  that the discerning MIME user requires, and the conformance to the
  standards wherever possible.  When configuring Mutt for MIME, there
  are two extra types of configuration files which Mutt uses.  One is
  the mime.types file, which contains the mapping of file extensions to
  IANA MIME types.  The other is the mailcap file, which specifies the
  external commands to use for handling specific MIME types.

  5.1.  Using MIME in Mutt

  There are three areas/menus in Mutt which deal with MIME, they are the
  pager (while viewing a message), the attachment menu and the compose
  menu.

  5.1.1.  Viewing MIME messages in the pager

  When you select a message from the index and view it in the pager,
  Mutt decodes the message to a text representation.  Mutt internally
  supports a number of MIME types, including text/plain, text/enriched,
  message/rfc822, and message/news.  In addition, the export controlled
  version of Mutt recognizes a variety of PGP MIME types, including
  PGP/MIME and application/pgp.

  Mutt will denote attachments with a couple lines describing them.
  These lines are of the form:

       [-- Attachment #1: Description --]
       [-- Type: text/plain, Encoding: 7bit, Size: 10000 --]

  Where the Description is the description or filename given for the
  attachment, and the Encoding is one of 7bit/8bit/quoted-
  printable/base64/binary.

  If Mutt cannot deal with a MIME type, it will display a message like:

       [-- image/gif is unsupported (use 'v' to view this part) --]

  5.1.2.  The Attachment Menu

  The default binding for view-attachments is `v', which displays the
  attachment menu for a message.  The attachment menu displays a list of
  the attachments in a message.  From the attachment menu, you can save,
  print, pipe, and view attachments.  You can apply these operations to
  a group of attachments at once, by tagging the attachments and by
  using the ``tag-prefix'' operator.  You can also reply to the current
  message from this menu, and only the current attachment (or the
  attachments tagged) will be quoted in your reply.  You can view
  attachments as text, or view them using the mailcap viewer definition.
  See the help on the attachment menu for more information.

  5.1.3.  The Compose Menu

  The compose menu is the menu you see before you send a message.  It
  allows you to edit the recipient list, the subject, and other aspects
  of your message.  It also contains a list of the attachments of your
  message, including the main body.  From this menu, you can print,
  copy, filter, pipe, edit, compose, review, and rename an attachment or
  a list of tagged attachments.  You can also modifying the attachment
  information, notably the type, encoding and description.
  Attachments appear as follows:

  -   1 [text/plain, 7bit, 1K]             /tmp/mutt-euler-8082-0 <no description>
      2 [applica/x-gunzip, base64, 422K]   ~/src/mutt-0.85.tar.gz <no description>

  The '-' denotes that Mutt will delete the file after sending the
  message.  It can be toggled with the toggle-unlink command (default:
  u).  The next field is the MIME content-type, and can be changed with
  the edit-type command (default: ^T).  The next field is the encoding
  for the attachment, which allows a binary message to be encoded for
  transmission on 7bit links.  It can be changed with the edit-encoding
  command (default: ^E).  The next field is the size of the attachment,
  rounded to kilobytes or megabytes.  The next field is the filename,
  which can be changed with the rename-file command (default: R).  The
  final field is the description of the attachment, and can be changed
  with the edit-description command (default: d).

  5.2.  MIME Type configuration with mime.types

  When you add an attachment to your mail message, Mutt searches your
  personal mime.types file at ${HOME}/.mime.types, and then the system
  mime.types file at SHAREDIR/mime.types.  SHAREDIR is defined at
  compilation time, and can be determined by typing mutt -v from the
  command line.

  The mime.types file consist of lines containing a MIME type and a
  space separated list of extensions.  For example:

       application/postscript          ps eps
       application/pgp                 pgp
       audio/x-aiff                    aif aifc aiff

  A sample mime.types file comes with the Mutt distribution, and should
  contain most of the MIME types you are likely to use.

  If Mutt can not determine the mime type by the extension of the file
  you attach, it will look at the file.  If the file is free of binary
  information, Mutt will assume that the file is plain text, and mark it
  as text/plain.  If the file contains binary information, then Mutt
  will mark it as application/octect-stream.  You can change the MIME
  type that Mutt assigns to an attachment by using the edit-type command
  from the compose menu (default: ^T).  When typing in the MIME type,
  Mutt requires that major type be one of the 5 types: application,
  text, image, video, or audio.  If you attempt to use a different major
  type, Mutt will abort the change.

  5.3.  MIME Viewer configuration with mailcap

  Mutt supports RFC 1524 MIME Configuration, in particular the Unix
  specific format specified in Appendix A of RFC 1524.  This file format
  is commonly refered to as the mailcap format.  Many MIME compliant
  programs utilize the mailcap format, allowing you to specify handling
  for all MIME types in one place for all programs.  Programs known to
  use this format include Netscape, MosaicX, lynx and metamail.

  In order to handle various MIME types that Mutt can not handle
  internally, Mutt parses a series of external configuration files to
  find an external handler.  The default search string for these files
  is a colon delimited list set to

       ${HOME}/.mailcap:SHAREDIR/mailcap:/etc/mailcap:/usr/etc/mailcap:/usr/local/etc/mailcap

  where $HOME is your home directory and SHAREDIR is the shared direc-
  tory defined at compile time (visible from mutt -v).

  In particular, the metamail distribution will install a mailcap file,
  usually as /usr/local/etc/mailcap, which contains some baseline
  entries.

  5.3.1.  The Basics of the mailcap file

  A mailcap file consists of a series of lines which are comments,
  blank, or definitions.

  A comment line consists of a # character followed by anything you
  want.

  A blank line is blank.

  A definition line consists of a content type, a view command, and any
  number of optional fields.  Each field of a definition line is divided
  by a semicolon ';' character.

  The content type is specified in the MIME standard type/subtype
  method.  For example, text/plain, text/html, image/gif, etc.  In
  addition, the mailcap format includes two formats for wildcards, one
  using the special '*' subtype, the other is the implicit wild, where
  you only include the major type.  For example, image/*, or video, will
  match all image types and video types, respectively.

  The view command is a Unix command for viewing the type specified.
  There are two different types of commands supported. The default is to
  send the body of the MIME message to the command on stdin. You can
  change this behaviour by using %s as a parameter to your view command.
  This will cause Mutt to save the body of the MIME message to a
  temporary file, and then call the view command with the %s replaced by
  the name of the temporary file. In both cases, Mutt will turn over the
  terminal to the view program until the program quits, at which time
  Mutt will remove the temporary file if it exists.

  So, in the simplest form, you can send a text/plain message to the
  external pager more on stdin:

       text/plain; more

  Or, you could send the message as a file:

       text/plain; more %s

  Perhaps you would like to use lynx to interactively view a text/html
  message:
       text/html; lynx %s

  In this case, lynx does not support viewing a file from stdin, so you
  must use the %s syntax.  Note: Some older versions of lynx contain a
  bug where they will check the mailcap file for a viewer for text/html.
  They will find the line which calls lynx, and run it.  This causes
  lynx to continously spawn itself to view the object.

  On the other hand, maybe you don't want to use lynx interactively, you
  just want to have it convert the text/html to text/plain, then you can
  use:

       text/html; lynx -dump %s | more

  Perhaps you wish to use lynx to view text/html files, and a pager on
  all other text formats, then you would use the following:

       text/html; lynx %s
       text/*; more

  This is the simplest form of a mailcap file.

  5.3.2.  Advanced mailcap Usage

  5.3.2.1.  Optional Fields

  In addition to the required content-type and view command fields, you
  can add semi-colon ';' separated fields to set flags and other
  options.  Mutt recognizes the following optional fields:

     copiousoutput
        This flag tells Mutt that the command passes possibly large
        amounts of text on stdout.  This causes Mutt to invoke a pager
        (either the internal pager or the external pager defined by the
        pager variable) on the output of the view command.  Without this
        flag, Mutt assumes that the command is interactive.  One could
        use this to replace the pipe to more in the lynx -dump example
        in the Basic section:

          text/html; lynx -dump %s ; copiousoutput

     This will cause lynx to format the text/html output as text/plain
     and Mutt will use your standard pager to display the results.

     needsterminal
        Mutt uses this flag when viewing attachments with ``autoview'',
        in order to decide whether it should honor the setting of the
        ``$wait_key'' variable or not.  When an attachment is viewed
        using an interactive program, and the corresponding mailcap
        entry has a needsterminal flag, Mutt will use ``$wait_key'' and
        the exit status of the program to decide if it will ask you to
        press a key after the external program has exited.  In all other
        situations it will not prompt you for a key.

     compose=<command>
        Mutt recognizes this flag, but doesn't currently use it, instead
        calling the edit command to create messages instead.

     print=<command>
        This flag specifies the command to use to print a specific MIME
        type.  Mutt supports this from the attachment and compose menus.

     edit=<command>
        This flag specifies the command to use to edit a specific MIME
        type.  Mutt supports this from the compose menu, and also uses
        it to compose new attachments.  Mutt will default to the defined
        editor for text attachmments.

     nametemplate=<template>
        This field specifies the format for the file denoted by %s in
        the command fields.  Certain programs will require a certain
        file extension, for instance, to correctly view a file.  For
        instance, lynx will only interpret a file as text/html if the
        file ends in .html.  So, you would specify lynx as a text/html
        viewer with a line in the mailcap file like:

          text/html; lynx %s; nametemplate=%s.html

     test=<command>
        This field specifies a command to run to test whether this
        mailcap entry should be used.  The command is defined with the
        command expansion rules defined in the next section.  If the
        command returns 0, then the test passed, and Mutt uses this
        entry.  If the command returns non-zero, then the test failed,
        and Mutt continues searching for the right entry.  Note: the
        content-type must match before Mutt performs the test.  For
        example:

          text/html; netscape -remote 'openURL(%s)' ; test=RunningX
          text/html; lynx %s

     In this example, Mutt will run the program RunningX which will
     return 0 if the X Window manager is running, and non-zero if it
     isn't.  If RunningX returns 0, then Mutt will call netscape to dis-
     play the text/html object.  If RunningX doesn't return 0, then Mutt
     will go on to the next entry and use lynx to display the text/html
     object.

  5.3.2.2.  Search Order

  When searching for an entry in the mailcap file, Mutt will search for
  the most useful entry for its purpose.  For instance, if you are
  attempting to print an image/gif, and you have the following entries
  in your mailcap file, Mutt will search for an entry with the print
  command:
       image/*;        xv %s
       image/gif;      ; print= anytopnm %s | pnmtops | lpr; \
                       nametemplate=%s.gif

  Mutt will skip the image/* entry and use the image/gif entry with the
  print command.

  In addition, you can use this with ``Autoview'' to denote two commands
  for viewing an attachment, one to be viewed automatically, the other
  to be viewed interactively from the attachment menu.  In addition, you
  can then use the test feature to determine which viewer to use
  interactively depending on your environment.

       text/html;      netscape -remote 'openURL(%s)' ; test=RunningX
       text/html;      lynx %s; nametemplate=%s.html
       text/html;      lynx -dump %s; nametemplate=%s.html; copiousoutput

  For ``Autoview'', Mutt will choose the third entry because of the
  copiousoutput tag.  For interactive viewing, Mutt will run the program
  RunningX to determine if it should use the first entry.  If the pro-
  gram returns non-zero, Mutt will use the second entry for interactive
  viewing.

  5.3.2.3.  Command Expansion

  The various commands defined in the mailcap files are passed to the
  /bin/sh shell using the system() function.  Before the command is
  passed to /bin/sh -c, it is parsed to expand various special
  parameters with information from Mutt.  The keywords Mutt expands are:

     %s As seen in the basic mailcap section, this variable is expanded
        to a filename specified by the calling program.  This file
        contains the body of the message to view/print/edit or where the
        composing program should place the results of composition.  In
        addition, the use of this keyword causes Mutt to not pass the
        body of the message to the view/print/edit program on stdin.

     %t Mutt will expand %t to the text representation of the content
        type of the message in the same form as the first parameter of
        the mailcap definition line, ie text/html or image/gif.

     %{<parameter>}
        Mutt will expand this to the value of the specified parameter
        from the Content-Type: line of the mail message.  For instance,
        if Your mail message contains:

          Content-Type: text/plain; charset=iso-8859-1

     then Mutt will expand %{charset} to iso-8859-1.  The default meta-
     mail mailcap file uses this feature to test the charset to spawn an
     xterm using the right charset to view the message.

     \% This will be replaced by a %

  Mutt does not currently support the %F and %n keywords specified in
  RFC 1524.  The main purpose of these parameters is for multipart mes-
  sages, which is handled internally by Mutt.

  5.3.3.  Example mailcap files

  This mailcap file is fairly simple and standard:

  ______________________________________________________________________
  # I'm always running X :)
  video/*;        xanim %s > /dev/null
  image/*;        xv %s > /dev/null

  # I'm always running netscape (if my computer had more memory, maybe)
  text/html;      netscape -remote 'openURL(%s)'
  ______________________________________________________________________

  This mailcap file shows quite a number of examples:

  ______________________________________________________________________
  # Use xanim to view all videos   Xanim produces a header on startup,
  # send that to /dev/null so I don't see it
  video/*;        xanim %s > /dev/null

  # Send html to a running netscape by remote
  text/html;      netscape -remote 'openURL(%s)'; test=RunningNetscape

  # If I'm not running netscape but I am running X, start netscape on the
  # object
  text/html;      netscape %s; test=RunningX

  # Else use lynx to view it as text
  text/html;      lynx %s

  # This version would convert the text/html to text/plain
  text/html;      lynx -dump %s; copiousoutput

  # enriched.sh converts text/enriched to text/html and then uses
  # lynx -dump to convert it to text/plain
  text/enriched;  enriched.sh ; copiousoutput

  # I use enscript to print text in two columns to a page
  text/*;         more %s; print=enscript -2Gr %s

  # Netscape adds a flag to tell itself to view jpegs internally
  image/jpeg;xv %s; x-mozilla-flags=internal

  # Use xv to view images if I'm running X
  # In addition, this uses the \ to extend the line and set my editor
  # for images
  image/*;xv %s; test=RunningX; \
          edit=xpaint %s

  # Convert images to text using the netpbm tools
  image/*;  (anytopnm %s | pnmscale -xysize 80 46 | ppmtopgm | pgmtopbm |
  pbmtoascii -1x2 ) 2>&1 ; copiousoutput

  # Send excel spreadsheets to my NT box
  application/ms-excel; open.pl %s
  ______________________________________________________________________

  5.4.  MIME Autoview

  In addition to explicitly telling Mutt to view an attachment with the
  MIME viewer defined in the mailcap file, Mutt has support for
  automatically viewing MIME attachments while in the pager.

  To work, you must define a viewer in the mailcap file which uses the
  copiousoutput option to denote that it is non-interactive.  Usually,
  you also use the entry to convert the attachment to a text
  representation which you can view in the pager.

  You then use the auto_view muttrc command to list the content-types
  that you wish to view automatically.

  For instance, if you set auto_view to:

       auto_view text/html text/enriched application/x-gunzip application/postscript image/gif application/x-tar-gz

  Mutt could use the following mailcap entries to automatically view
  attachmments of these types.

       text/html;      lynx -dump %s; copiousoutput; nametemplate=%s.html
       text/enriched;  enriched.sh  ; copiousoutput
       image/*;        anytopnm %s | pnmscale -xsize 80 -ysize 50 | ppmtopgm | pgmtopbm | pbmtoascii ; copiousoutput
       application/x-gunzip;   gzcat; copiousoutput
       application/x-tar-gz; gunzip -c %s | tar -tf - ; copiousoutput
       application/postscript; ps2ascii %s; copiousoutput

  6.  Reference

  6.1.  Command line options

  Running mutt with no arguments will make Mutt attempt to read your
  spool mailbox.  However, it is possible to read other mailboxes and to
  send messages from the command line as well.

       -a      attach a file to a message
       -c      specify a carbon-copy (Cc) address
       -F      specify an alternate file to read initialization commands
       -f      specify a mailbox to load
       -h      print help on command line options
       -H      specify a draft file from which to read a header and body
       -i      specify a file to include in a message composition
       -n      do not read the system Muttrc
       -m      specify a default mailbox type
       -p      recall a postponed message
       -R      open mailbox in read-only mode
       -s      specify a subject (enclose in quotes if it contains spaces)
       -v      show version number and compile-time definitions
       -x      simulate the mailx(1) compose mode
       -y      show a menu containing the files specified by the mailboxes command
       -z      exit immediately if there are no messages in the mailbox
       -Z      open the first folder with new message,exit immediately if none

  To read messages in a mailbox

  mutt [ -nz ] [ -F muttrc ] [ -m type ] [ -f mailbox ]

  To compose a new message

  mutt [ -n ] [ -F muttrc ] [ -a file ] [ -c address ] [ -i filename ] [
  -s subject ] address [ address ... ]

  Mutt also supports a ``batch'' mode to send prepared messages.  Simply
  redirect input from the file you wish to send.  For example,

  mutt -s "data set for run #2" professor@bigschool.edu < ~/run2.dat

  This command will send a message to ``professor@bigschool.edu'' with a
  subject of ``data set for run #2''.  In the body of the message will
  be the contents of the file ``~/run2.dat''.

  6.2.  Configuration Commands

  The following are the commands understood by mutt.

  o  ``alias'' key address [ , address, ... ]

  o  ``unalias'' key address [ , address, ... ]

  o  ``auto_view'' mimetype [ mimetype ... ]

  o  ``bind'' map key function

  o  ``color'' object foreground background [ regexp ]

  o  ``folder-hook'' pattern command

  o  ``ignore'' pattern [ pattern ... ]

  o  ``unignore'' pattern [ pattern ... ]

  o  ``hdr_order'' header [ header ... ]

  o  ``lists'' address [ address ... ]

  o  ``unlists'' address [ address ... ]

  o  ``macro'' menu key sequence

  o  ``mailboxes'' filename [ filename ... ]

  o  ``mono'' object attribute [ regexp ]

  o  ``mbox-hook'' pattern mailbox

  o  ``my_hdr'' string

  o  ``unmy_hdr'' field [ field ... ]

  o  ``push'' string

  o  ``save-hook'' regexp filename

  o  ``send-hook'' regexp command

  o  ``set'' [no|inv]variable[=value] [ variable ... ]

  o  ``toggle'' variable [variable ... ]

  o  ``unset'' variable [variable ... ]

  o  ``source'' filename

  6.3.  Configuration variables

  6.3.1.  abort_nosubject

  Type: quadoption
  Default: ask-yes

  If set to yes, when composing messages and no subject is given at the
  subject prompt, composition will be aborted.  If set to no, composing
  messages with no subject given at the subject prompt will never be
  aborted.

  6.3.2.  abort_unmodified

  Type: quadoption
  Default: yes

  If set to yes, composition will automatically abort after editing the
  message body if no changes are made to the file (this check only
  happens after the first edit of the file).  When set to no,
  composition will never be aborted.

  6.3.3.  alias_file

  Type: string
  Default: ~/.muttrc

  The default file in which to save aliases created by the ``create-
  alias'' function.

  Note: Mutt will not automatically source this file; you must
  explicitly use the ``source'' command for it to be executed.

  6.3.4.  allow_8bit

  Type: boolean
  Default: set

  Controls whether 8-bit data is converted to 7-bit using either Quoted-
  Printable or Base64 encoding when sending mail.

  6.3.5.  alternates

  Type: string
  Default: none

  A regexp that allows you to specify alternate addresses where you
  receive mail.  This affects Mutt's idea about messages from you and
  addressed to you.

  6.3.6.  arrow_cursor

  Type: boolean
  Default: unset

  When set, an arrow (``->'') will be used to indicate the current entry
  in menus instead of hiliting the whole line.  On slow network or modem
  links this will make response faster because there is less that has to
  be redrawn on the screen when moving to the next or previous entries
  in the menu.

  6.3.7.  ascii_chars

  Type: boolean
  Default: unset

  If set, Mutt will use plain ASCII characters when displaying thread
  and attachment trees, instead of the default ACS characters.

  6.3.8.  askbcc

  Type: boolean
  Default: unset

  If set, Mutt will prompt you for blind-carbon-copy (Bcc) recipients
  before editing an outgoing message.

  6.3.9.  askcc

  Type: boolean
  Default: unset

  If set, Mutt will prompt you for carbon-copy (Cc) recipients before
  editing the body of an outgoing message.

  6.3.10.  attach_sep

  Type: string
  Default: newline

  The separator to add between attachments when piping or saving a list
  of tagged attachments to an external Unix command.

  6.3.11.  attach_split

  Type: boolean
  Default: set

  Used in connection with the pipe-entry and save-entry commands and the
  ``tag-prefix'' operator in the ``attachment'' menu.  If this variable
  is unset, when piping or saving a list of tagged attachments Mutt will
  concatenate the attachments and will pipe or save them as a single
  file.  The ``attach_sep'' separator will be added after each message.
  When set, Mutt will pipe or save the messages one by one.  In both
  cases the the messages are processed in the displayed order.

  6.3.12.  attribution

  Type: format string
  Default: "On %d, %n wrote:"
  This is the string that will precede a message which has been included
  in a reply.  For a full listing of defined escape sequences see the
  section on ``$hdr_format''.

  6.3.13.  autoedit

  Type: boolean
  Default: unset

  When set, Mutt will skip the initial send-menu and allow you to
  immediately begin editing the body of your message when replying to
  another message.  The send-menu may still be accessed once you have
  finished editing the body of your message.

  If the ``$edit_hdrs'' variable is also set, the initial prompts in the
  send-menu are always skipped, even when composing a new message.

  6.3.14.  auto_tag

  Type: boolean
  Default: unset

  When set, functions in the index menu which affect a message will be
  applied to all tagged messages (if there are any).  When unset, you
  must first use the tag-prefix function (default: ";") to make the next
  function apply to all tagged messages.

  6.3.15.  beep

  Type: boolean
  Default: set

  When this variable is set, mutt will beep when an error occurs.

  6.3.16.  charset

  Type: string
  Default: iso-8859-1

  Character set your terminal uses to display and enter textual data.
  This information is required to properly label outgoing messages which
  contain 8-bit characters so that receiving parties can display your
  messages in the correct character set.

  6.3.17.  check_new

  Type: boolean
  Default: set

  Note: this option only affects maildir and MH style mailboxes.

  When set, Mutt will check for new mail delivered while the mailbox is
  open.  Especially with MH mailboxes, this operation can take quite
  some time since it involves scanning the directory and checking each
  file to see if it has already been looked at.  If check_new is unset,
  no check for new mail is performed while the mailbox is open.

  6.3.18.  confirmappend

  Type: boolean
  Default: set

  When set, Mutt will prompt for confirmation when appending messages to
  an existing mailbox.

  6.3.19.  confirmcreate

  Type: boolean
  Default: set

  When set, Mutt will prompt for confirmation when saving messages to a
  mailbox which does not yet exist before creating it.

  6.3.20.  copy

  Type: quadoption
  Default: yes

  This variable controls whether or not copies of your outgoing messages
  will be saved for later references.  Also see ``record'',
  ``save_name'', ``force_name'' and ``fcc-hook''.

  6.3.21.  date_format

  Type: string
  Default: "!%a, %b %d, %Y at %I:%M:%S%p %Z"

  This variable controls the format of the date printed by the ``%d''
  sequence in ``$hdr_format''.  This is passed to the strftime call to
  process the date. See the man page for strftime(3) for the proper
  syntax.

  Unless the first character in the string is a bang (``!''), the month
  and week day names are expanded according to the locale specified in
  the variable ``locale''. If the first character in the string is a
  bang, the bang is discarded, and the month and week day names in the
  rest of the string are expanded in the C locale (that is in US
  English).

  6.3.22.  delete

  Type: quadoption
  Default: ask-yes

  Controls whether or not messages are really deleted when closing or
  synchronizing a mailbox.  If set to yes, messages marked for deleting
  will automatically be purged without prompting.  If set to no,
  messages marked for deletion will be kept in the mailbox.

  6.3.23.  dsn_notify

  Type: string
  Default: none

  Note: you should not enable this unless you are using Sendmail 8.8.x
  or greater.

  This variable sets the request for when notification is returned.  The
  string consists of a comma separated list (no spaces!) of one or more
  of the following: never, to never request notification, failure, to
  request notification on transmission failure, delay, to be notified of
  message delays, success, to be notified of successful transmission.

  Example: set dsn_notify="failure,delay"

  6.3.24.  dsn_return

  Type: string Default: none

  Note: you should not enable this unless you are using Sendmail 8.8.x
  or greater.

  This variable controls how much of your message is returned in DSN
  messages.  It may be set to either hdrs to return just the message
  header, or full to return the full message.

  Example: set dsn_return=hdrs

  6.3.25.  edit_hdrs

  Type: boolean
  Default: unset

  This option allows you to edit the header of your outgoing messages
  along with the body of your message.

  Also see ``edit_headers''.

  6.3.26.  editor

  Type: String
  Default: value of environment variable $VISUAL, $EDITOR, or "vi"

  This variable specifies which editor to use when composing messages.

  6.3.27.  escape

  Type: string
  Default: ~

  Escape character to use for functions in the builtin editor.

  6.3.28.  fast_reply

  Type: boolean
  Default: unset

  When set, the initial prompt for recipients and subject are skipped
  when replying to messages, and the initial prompt for subject is
  skipped when forwarding messages.

  Note: this variable has no effect when the ``$autoedit'' variable is
  set.

  6.3.29.  fcc_attach

  Type: boolean
  Default: set

  This variable controls whether or not attachments on outgoing messages
  are saved along with the main body of your message.

  6.3.30.  folder

  Type: String
  Default: ~/Mail

  Specifies the default location of your mailboxes.  A `+' or `=' at the
  beginning of a pathname will be expanded to the value of this
  variable.  Note that if you change this variable from the default
  value you need to make sure that the assignment occurs before you use
  `+' or `=' for any other variables since expansion takes place during
  the `set' command.

  6.3.31.  force_name

  Type: boolean
  Default: unset

  This variable is similar to ``$save_name'', except that Mutt will
  store a copy of your outgoing message by the username of the address
  you are sending to even if that mailbox does not exist.

  Also see the ``$record'' variable.

  6.3.32.  forw_decode

  Type: boolean
  Default: unset

  When set, forwarded messages will have their header weeded, and will
  be converted to plain text (similar to what you seen when viewing a
  message) when included in your new message.

  Also see ``mime_fwd''.

  6.3.33.  forw_format

  Type: format string
  Default: "[%a: %s]"

  This variable controls the default subject when forwarding a message.
  It uses the same format sequences as the ``$hdr_format'' variable.

  6.3.34.  forw_quote

  Type: boolean
  Default: unset

  When set forwarded messages included in the main body of the message
  (when ``mime_fwd'' is unset) will be quoted using ``indent_str''.

  6.3.35.  hdr_format

  Type: format string
  Default: "%4C %Z %{%b %d} %-15.15L (%4l) %s"

  This variable allows you to customize the message index display to
  your personal taste.

  ``Format strings'' are similar to the strings used in the ``C''
  function printf to format output (see the man page for more detail).
  The following sequences are defined in Mutt:

       %a      address of the author
       %c      number of characters (bytes) in the message
       %C      current message number
       %d      date and time of the message in the format specified by
               ``date_format''
       %f      entire From: line (address + real name)
       %F      author name, or recipient name if the message is from you
       %i      message-id of the current message
       %l      number of lines in the message
       %L      list-from function
       %m      total number of message in the mailbox
       %n      author's real name (or address if missing)
       %s      subject of the message
       %S      status of the message (N/D/!/*/r)
       %t      `to:' field (recipients)
       %T      the appropriate character from the $<ref id="to_chars" name="to_chars"> string
       %u      user (login) name of the author
       %Z      message status flags

       %{fmt}  the date and time of the message is converted to sender's
               time zone, and ``fmt'' is expanded by the system call
               ``strftime''; a leading bang disables locales
       %[fmt]  the date and time of the message is converted to the local
               time zone, and ``fmt'' is expanded by the system call
               ``strftime''; a leading bang disables locales

       %>X     right justify the rest of the string and pad with character "X"
       %|X     pad to the end of the line with character "X"

  6.3.36.  hdrs

  Type: boolean
  Default: set

  When unset, the header fields normally added by the ``my_hdr'' command
  are not created.  This variable must be unset before composing a new
  message or replying in order to take effect.  If set, the user defined
  header fields are added to every new message (except when sending in
  batch mode).

  6.3.37.  header

  Type: boolean
  Default: unset

  When set, this variable causes Mutt to include the full header of the
  message you are replying to into the edit buffer.
  6.3.38.  help

  Type: boolean
  Default: set

  When set, help lines describing the bindings for the major functions
  provided by each menu are displayed on the first line of the screen.

  Note: The binding will not be displayed correctly if the function is
  bound to a sequence rather than a single keystroke.  Also, the help
  line may not be updated if a binding is changed while Mutt is running.
  Since this variable is primarily aimed at new users, neither of these
  should present a major problem.

  6.3.39.  history

  Type: number
  Default: 10

  This variable controls the size (in number of strings remembered) of
  the string history buffer. The buffer is cleared each time the
  variable is set.

  6.3.40.  hostname

  Type: string
  Default: varies

  Specifies the hostname to use after the ``@'' in local e-mail
  addresses.  This overrides the compile time definition obtained from
  /etc/resolv.conf.

  6.3.41.  ignore_list_reply_to

  Type: boolean
  Default: unset

  Affects the behaviour of the reply function when replying to messages
  from mailing lists.  When set, if the ``Reply-To:'' field is set to
  the same value as the ``To:'' field, Mutt assumes that the ``Reply-
  To:'' field was set by the mailing list to automate responses to the
  list, and will ignore this field.  To direct a response to the mailing
  list when this option is set, use the list-reply function; group-reply
  will reply to both the sender and the list.

  6.3.42.  in_reply_to

  Type: format string
  Default: "%i; from \"%n\" on %{!%a, %b %d, %Y at %I:%M:%S%p}"

  This specifies the format of the In-Reply-To: header field added when
  replying to a message. For a full listing of defined escape sequences
  see the section on ``$hdr_format''.

  6.3.43.  include

  Type: quadoption
  Default: ask-yes

  Controls whether or not a copy of the message(s) you are replying to
  is included in your reply.
  6.3.44.  indent_str

  Type: format string
  Default: "> "

  Specifies the string to prepend to each line of text quoted in a
  message to which you are replying.  You are strongly encouraged not to
  change this value, as it tends to agitate the more fanatical netizens.

  6.3.45.  ispell

  Type: string
  Default: "ispell"

  How to invoke ispell (GNU's spell-checking software).

  6.3.46.  locale

  Type: string
  Default: "C"

  The locale used by strftime(3) to format dates. Legal values are the
  strings your system accepts for the locale variable LC_TIME.

  6.3.47.  mailcap_path

  Type: string
  Default: $MAILCAPS or
  ~/.mailcap:/usr/local/share/mailcap:/etc/mailcap:/usr/etc/mailcap:/usr/local/etc/mailcap

  This variable specifies which files took consult when attempting to
  display MIME bodies not directly supported by Mutt.

  6.3.48.  mark_old

  Type: Boolean
  Default: set

  Controls whether or not Mutt makes the distinction between new
  messages and old unread messages.  By default, Mutt will mark new
  messages as old if you exit a mailbox without reading them.  The next
  time you start Mutt, the messages will show up with an "O" next to
  them in the index menu, indicating that they are old.  In order to
  make Mutt treat all unread messages as new only, you can unset this
  variable.

  6.3.49.  markers

  Type: boolean
  Default: set

  Controls the display of wrapped lines in the internal pager. If set, a
  ``+'' marker is displayed at the beginning of wrapped lines. Also see
  the ``$smart_wrap'' variable.

  6.3.50.  mask

  Type: string
  Default: "^(\.\.$|[^.])"

  A regular expression used in the file browser. Files whose names don't
  match this mask will not be shown.

  6.3.51.  mbox

  Type: String
  Default: +inbox

  This specifies the folder into which read mail in your ``spoolfile''
  folder will be appended.

  6.3.52.  mbox_type

  Type: String
  Default: mbox

  The default mailbox type used when creating new folders. May be any of
  mbox, MMDF, MH and Maildir.

  6.3.53.  metoo

  Type: boolean
  Default: unset

  If unset, Mutt will remove your address from the list of recipients
  when replying to a message.  If you are replying to a message sent by
  you, Mutt will also assume that you want to reply to the recipients of
  that message rather than to yourself.

  6.3.54.  menu_scroll

  Type: boolean
  Default: unset

  When set, menus will be scrolled up or down one line when you attempt
  to move across a screen boundary.  If unset, the screen is cleared and
  the next or previous page of the menu is displayed (useful for slow
  links to avoid many redraws).

  6.3.55.  mime_fwd

  Type: boolean
  Default: unset

  When set, the message you are forwarding will be attached as a
  separate MIME part instead of included in the main body of the
  message.  This is useful for forwarding MIME messages so the receiver
  can properly view the message.

  Also see ``forw_decode''.

  6.3.56.  move

  Type: quadoption
  Default: ask-no

  Controls whether you will be asked to confirm moving read messages
  from your spool mailbox to your ``$mbox'' mailbox, or as a result of a
  ``mbox-hook'' command.

  6.3.57.  msg_format

  Type: string
  Default: "%s"

  This is the string displayed in the ``attachment'' menu for
  attachments of type message/rfc822.  For a full listing of defined
  escape sequences see the section on ``hdr_format''.

  6.3.58.  pager

  Type: string
  Default: builtin

  This variable specifies which pager you would like to use to view
  messages.  builtin means to use the builtin pager, otherwise this
  variable should specify the pathname of the external pager you would
  like to use.

  6.3.59.  pager_context

  Type: number
  Default: 0

  This variable controls the number of lines of context that are given
  when displaying the next or previous page in the internal pager.  By
  default, Mutt will display the line after the last one on the screen
  at the top of the next page (0 lines of context).

  6.3.60.  pager_format

  Type: format string
  Default: "-%S- %C/%m: %-20.20n   %s"

  This variable controls the format of the one-line message ``status''
  displayed before each message in either the internal or an external
  pager.  The valid sequences are listed in the ``hdr_format'' section.

  6.3.61.  pager_index_lines

  Type: number
  Default: 0

  Determines the number of lines of a mini-index which is shown when in
  the pager.  The current message, unless near the top or bottom of the
  folder, will be roughly one third of the way down this mini-index,
  giving the reader the context of a few messages before and after the
  message.  This is useful, for example, to determine how many messages
  remain to be read in the current thread.  One of the lines is reserved
  for the status bar from the index, so a pager_index_lines of 6 will
  only show 5 lines of the actual index.  A value of 0 results in no
  index being shown.  If the number of messages in the current folder is
  less than pager_index_lines, then the index will only use as many
  lines as it needs.

  6.3.62.  pager_stop

  Type: boolean
  Default: unset

  When set, the internal-pager will not move to the next message when
  you are at the end of a message and invoke the next-page function.

  6.3.63.  pgp

  Type: string
  Default: system dependent

  This variable allows you to override the compile time definition of
  where the PGP binary resides on your system.

  6.3.64.  pgp_autoencrypt

  Type: boolean
  Default: unset

  Setting this variable will cause Mutt to always attempt to PGP/MIME
  encrypt outgoing messages.  This is probably only useful in connection
  to the send-hook command.  It can be overridden by use of the pgp-
  menu, when encryption is not required or signing is requested as well.

  6.3.65.  pgp_autosign

  Type: boolean
  Default: unset

  Setting this variable will cause Mutt to always attempt to PGP/MIME
  sign outgoing messages.  This can be overridden by use of the pgp-
  menu, when signing is not required or encryption is requested as well.

  6.3.66.  pgp_encryptself

  Type: boolean
  Default: set

  If set, the PGP +encrypttoself flag is used when encrypting messages.

  6.3.67.  pgp_pubring

  Type: string
  Default: $PGPPATH/pubring.pgp or ~/.pgp/pubring.pgp if $PGPPATH isn't
  set.

  Points to the PGP public keyring.

  6.3.68.  pgp_replyencrypt

  Type: boolean
  Default: unset

  If set, automatically PGP encrypt replies to messages which are
  encrypted.

  6.3.69.  pgp_replysign

  Type: boolean
  Default: unset

  If set, automatically PGP sign replies to messages which are signed.

  6.3.70.  pgp_secring

  Type: string
  Default: $PGPPATH/secring.pgp or ~/.pgp/secring.pgp if $PGPPATH isn't
  set.

  Points to the PGP secret keyring.

  6.3.71.  pgp_sign_as

  Type: string
  Default: unset

  If you have more than one key pair, this option allows you to specify
  which of your private keys to use.  It is recommended that you use the
  keyid form to specify your key (e.g., ``0xABCDEFGH'').

  6.3.72.  pgp_strict_enc

  Type: boolean
  Default: unset

  If set, Mutt will automatically encode PGP/MIME signed messages as
  quoted-printable.

  6.3.73.  pgp_timeout

  Type: number
  Default: 500

  The number of seconds after which a cached passphrase will expire if
  not used.

  6.3.74.  pipe_decode

  Type: boolean
  Default: unset

  Used in connection with the pipe-message command.  When unset, Mutt
  will pipe the messages without any preprocessing. When set, Mutt will
  weed headers and will attempt to PGP/MIME decode the messages first.

  6.3.75.  pipe_sep

  Type: string
  Default: newline

  The separator to add between messages when piping a list of tagged
  messages to an external Unix command.

  6.3.76.  pipe_split

  Type: boolean
  Default: unset

  Used in connection with the pipe-message command and the ``tag-
  prefix'' operator.  If this variable is unset, when piping a list of
  tagged messages Mutt will concatenate the messages and will pipe them
  as a single folder.  When set, Mutt will pipe the messages one by one.
  In both cases the the messages are piped in the current sorted order,
  and the ``$pipe_sep'' separator is added after each message.

  6.3.77.  pop_delete

  Type: boolean
  Default: unset

  If set, Mutt will delete successfully downloaded messages from the POP
  server when using the fetch-mail function.  When unset, Mutt will
  download messages but also leave them on the POP server.

  6.3.78.  pop_host

  Type: string
  Default: none

  The name or address of your POP3 server.

  6.3.79.  pop_pass

  Type: string
  Default: unset

  Specifies the password for you POP account.  If unset, Mutt will
  prompt you for your password when you invoke the fetch-mail function.
  Warning: you should only use this option when you are on a fairly
  secure machine, because the superuser can read your muttrc even if you
  are the only one who can read the file.

  6.3.80.  pop_port

  Type: number
  Default: 110

  This variable specifies which port your POP server is listening on.

  6.3.81.  pop_user

  Type: string
  Default: login name on local system

  Your login name on the POP3 server.

  6.3.82.  post_indent_str

  Type: format string
  Default: none

  Similar to the ``$attribution'' variable, Mutt will append this string
  after the inclusion of a message which is being replied to.

  6.3.83.  postpone

  Type: quadoption
  Default: ask-yes

  Controls whether or not messages are saved in the ``$postponed''
  mailbox when you elect not to send immediately.

  6.3.84.  postponed

  Type: string
  Default: ~/postponed

  Mutt allows you to indefinitely ``postpone sending a message'' which
  you are editing.  When you choose to postpone a message, Mutt saves it
  in the folder specified by this variable.  Also see the ``$postpone''
  variable.

  6.3.85.  print

  Type: quadoption
  Default: ask-no

  Controls whether or not Mutt asks for confirmation before printing.
  This is useful for people (like me) who accidentally hit ``p'' often.

  6.3.86.  print_cmd

  Type: string
  Default: lpr

  This specifies the command pipe that should be used to print messages.

  6.3.87.  prompt_after

  Type: boolean
  Default: set

  If you use an external ``pager'', setting this variable will cause
  Mutt to prompt you for a command when the pager exits rather than
  returning to the index menu.  If unset, Mutt will return to the index
  menu when the external pager exits.

  6.3.88.  quote_regexp

  Type: string
  Default: "^([ \t]*[>|#:}])+"

  A regular expression used in the internal-pager to determine quoted
  sections of text in the body of a message.

  Note: In order to use the quotedx patterns in the internal pager, you
  need to set this to a regular expression that matches exactly the
  quote characters at the beginning of quoted lines.

  6.3.89.  read_inc

  Type: number
  Default: 10

  If set to a value greater than 0, Mutt will display which message it
  is currently on when reading a mailbox.  The message is printed after
  read_inc messages have been read (e.g., if set to 25, Mutt will print
  a message when it reads message 25, and then again when it gets to
  message 50).  This variable is meant to indicate progress when reading
  large mailboxes which may take some time.

  When set to 0, only a single message will appear before the reading
  the mailbox.

  Also see the ``$write_inc'' variable.

  6.3.90.  read_only

  Type: boolean
  Default: unset

  If set, all folders are opened in read-only mode.

  6.3.91.  realname

  Type: string
  Default: GCOS field from /etc/passwd

  This variable specifies what "real" or "personal" name should be used
  when sending messages.

  6.3.92.  recall

  Type: quadoption
  Default: ask-yes

  Controls whether or not you are prompted to recall postponed messages
  when composing a new message.  Also see ``postponed''

  6.3.93.  record

  Type: string
  Default: none

  This specifies the file into which your outgoing messages should be
  appended.  (This is meant as the primary method for saving a copy of
  your messages, but another way to do this is using the ``my_hdr''
  command to create a Bcc: field with your email address in it.)

  The value of $record is overridden by the ``$force_name'' and
  ``$save_name'' variables, and the ``fcc-hook'' command.

  6.3.94.  references

  Type: number
  Default: 10

  If set to a value greater than 0, Mutt will trim the reference list in
  the References: field to at most that number of entries when replying.
  If set to 0, all entries are included.

  6.3.95.  reply_regexp

  Type: string
  Default: "^(re|aw):[ \t]*"

  A regular expression used to recognize reply messages when threading
  and replying. The default value corresponds to the English "Re:" and
  the German "Aw:".
  6.3.96.  reply_to

  Type: quadoption
  Default: ask-yes

  If set, Mutt will ask you if you want to use the address listed in the
  Reply-To: header field when replying to a message.  If you answer no,
  it will use the address in the From: header field instead.  This
  option is useful for reading a mailing list that sets the Reply-To:
  header field to the list address and you want to send a private
  message to the author of a message.

  6.3.97.  resolve

  Type: boolean
  Default: set

  When set, the cursor will be automatically advanced to the next
  (possibly undeleted) message whenever a command that modifies the
  current message is executed.

  6.3.98.  reverse_alias

  Type: boolean
  Default: unset

  This variable controls whether or not Mutt will display the "personal"
  name from your aliases in the index menu if it finds an alias that
  matches the message's sender.  For example, if you have the following
  alias:

       alias juser abd30425@somewhere.net (Joe User)

  and then you receive mail which contains the following header:

       From: abd30425@somewhere.net

  It would be displayed in the index menu as ``Joe User'' instead of
  ``abd30425@somewhere.net.''  This is useful when the person's e-mail
  address is not human friendly (like Compu$erve addresses).

  6.3.99.  reverse_name

  Type: boolean
  Default: unset

  It may sometimes arrive that you receive mail to a certain machine,
  move the messages to another machine, and reply to some the messages
  from there.  If this variable is set, the default From: line of the
  reply messages is built using the address where you received the
  messages you are replying to.  If the variable is unset, the From:
  line will use your address on the current machine.

  6.3.100.  save_address

  Type: boolean
  Default: unset

  If set, mutt will take the sender's full address when choosing a
  default folder for saving a mail. If ``save_name'' or ``force_name''
  is set too, the selection of the fcc folder will be changed as well.

  6.3.101.  save_empty

  Type: boolean
  Default: set

  When unset, mailboxes which contain no saved messages will be removed
  when closed (the exception is ``spoolfile'' which is never removed).
  If set, mailboxes are never removed.

  Note: This only applies to mbox and MMDF folders, Mutt does not delete
  MH and Maildir directories.

  6.3.102.  save_name

  Type: boolean
  Default: unset

  This variable controls how copies of outgoing messages are saved.
  When set, a check is made to see if a mailbox specified by the
  recipient address exists (this is done by searching for a mailbox in
  the ``folder'' directory with the username part of the recipient
  address).  If the mailbox exists, the outgoing message will be saved
  to that mailbox, otherwise the message is saved to the ``record''
  mailbox.

  Also see the ``$force_name'' variable.

  6.3.103.  sendmail

  Type: string
  Default: /usr/lib/sendmail -t -oi -oem

  Specifies the program and arguments used to deliver mail sent by Mutt.
  Mutt expects that the specified program will read the message header
  for recipients.  Also see ``sendmail_bounce''.

  6.3.104.  sendmail_bounce

  Type: string
  Default: /usr/lib/sendmail -oi -oem

  Specifies the program and arguments to use when sending mail with
  recipients listed on the command line rather than in the message
  header.  This is necessary when bouncing a message where you do not
  want to deliver the message to the original recipients, but to another
  address.

  6.3.105.  shell

  Type: string
  Default: retrieved from passwd file

  Command to use when spawning a subshell.

  6.3.106.  sig_dashes

  Type: boolean
  Default: set

  If set, a line containing ``-- '' will be inserted before your
  ``signature''.  It is strongly recommended that you not unset this
  variable unless your ``signature'' contains just your name.  The
  reason for this is because many software packages use ``-- \n'' to
  detect your signature.  For example, Mutt has the ability to highlight
  the signature in a different color in the builtin pager.

  6.3.107.  signature

  Type: string
  Default: ~/.signature

  Specifies the filename of your signature, which is appended to all
  outgoing messages.   If the filename ends with a pipe (``|''), it is
  assumed that filename is a shell command and input should be read from
  its stdout.

  6.3.108.  simple_search

  Type: string
  Default: "~f %s | ~s %s"

  Specifies how Mutt should expand a simple search into a real search
  pattern.  A simple search is one that does not contain any of the ~
  operators.  See ``searching'' for more information on search patterns.

  For example, if you simply type joe at a search or limit prompt, Mutt
  will automatically expand it to the value specified by this variable.
  For the default value it would be:

  ~f joe | ~s joe

  6.3.109.  smart_wrap

  Type: boolean
  Default: set

  Controls the display of lines longer then the screen width in the
  internal pager. If set, long lines are wrapped at a word boundary.  If
  unset, lines are simply wrapped at the screen edge. Also see the
  ``$markers'' variable.

  6.3.110.  sort

  Type: string
  Default: date-sent

  Specifies how to sort messages in the index menu.  Valid values are

  o  date-sent

  o  date-received

  o  from

  o  mailbox-order (unsorted)

  o  subject

  o  threads

  You may optionally use the reverse- prefix to specify reverse sorting
  order (example: set sort=reverse-date-sent).

  6.3.111.  sort_aux

  Type: string
  Default: date-sent

  When sorting by threads, this variable controls how threads are sorted
  in relation to each other, and how the branches of the thread trees
  are sorted.  This can usefully be set to any value that sort can,
  except "threads".  In that case, mutt wll just use "date-sent".  You
  can also specify the last- prefix.  It may be combinde with reverse-,
  but last- must come after reverse-.  This mutt sort a message against
  its siblings by which has the last descendant, using the rest of
  sort_aux as an ordering.  For instance, set sort_aux=last-date-
  received would mean that if a new message is received in a thread,
  that thread becomes the last one displayed (or the first, if youh have
  set sort=reverse-threads.)

  6.3.112.  sort_browser

  Type: string

  Specifies how to sort entries in the file browser.  By default, the
  entries are sorted alphabetically.  Valid values:

  o  date

  o  alpha (alphabetically)

  You may optionally use the reverse- prefix to specify reverse sorting
  order (example: set sort_browser=reverse-date).

  6.3.113.  spoolfile

  Type: string
  Default: most likely /var/mail/$USER or /usr/spool/mail/$USER

  If your spool mailbox is in a non-default place where Mutt cannot find
  it, you can specify its location with this variable.  Mutt will
  automatically set this variable to the value of the environment
  variable $MAIL if it is not set.

  6.3.114.  sort_re

  Type: boolean Default: set

  This variable is only useful when sorting by threads with
  ``strict_threads'' unset.  In that case, it changes the heuristic mutt
  uses to thread messages by subject.  With sort_re set, mutt will only
  attach a message as the child of another message by subject if the
  subject of the child message starts with a substring matching the
  setting of ``reply_regexp''.  With sort_re unset, mutt will attach the
  message whether or not this is the case, as long as the
  non-``reply_regexp'' parts of both messages are identical.

  6.3.115.  status_chars

  Type: string
  Default: "-*%"

  Controls the characters used by the "%r" indicator in
  ``status_format''. The first character is used when the mailbox is
  unchanged. The second is used when the mailbox has been changed, and
  it needs to be resynchronized. The third is used if the mailbox is in
  read-only mode, or if the mailbox will not be written when exiting
  that mailbox (You can toggle whether to write changes to a mailbox
  with the toggle-write operation, bound by default to "%").

  6.3.116.  status_format

  Type: string
  Default: "-%r-Mutt: %f [Msgs:%?M?%M/?%m%?n? New:%n?%?d? Del:%d?%?F?
  Flag:%F?%?t? Tag:%t?%?p? Post:%p?%?b? Inc:%b? %l]---(%s)%|-"

  Controls the format of the status line displayed in the index menu.
  This string is similar to ``$hdr_format'', but has its own set of
  printf()-like sequences:

       %b      number of mailboxes with new mail *
       %d      number of deleted messages *
       %h      local hostname
       %f      the full pathname of the current mailbox
       %F      number of flagged messages *
       %l      size (in bytes) of the current mailbox *
       %m      the number of messages in the mailbox *
       %M      the number of messages shown (i.e., which match the current limit) *
       %n      number of new messages in the mailbox *
       %p      number of postponed messages *
       %r      modified/read-only/won't-write indicator, according to $status_chars
       %s      current sorting mode
       %t      number of tagged messages *
       %v      Mutt version string

       %>X     right justify the rest of the string and pad with "X"
       %|X     pad to the end of the line with "X"

       * = can be optionally printed if nonzero

  Some of the above sequences can be used to optionally print a string
  if their value is nonzero.  For example, you may only want to see the
  number of flagged messages if such messages exist, since zero is not
  particularly meaningful.  To optionally print a string based upon one
  of the above sequences, the following contruct is used

               %?<sequence_char>?<optional_string>?

  where sequece_char is a character from the table above, and
  optional_string is the string you would like printed if status_char is
  nonzero.  optional_string may contain other sequence as well as normal
  text, but you may not nest optional strings.

  Here is an example illustrating how to optionally print the number of
  new messages in a mailbox:

               %?n?%n new messages.?

  6.3.117.  status_on_top

  Type: boolean
  Default: unset

  Setting this variable causes the ``status bar'' to be displayed on the
  first line of the screen rather than near the bottom.

  6.3.118.  strict_threads

  Type: boolean
  Default: unset

  If set, threading will only make use of the ``In-Reply-To'' and
  ``References'' fields when ``sorting'' by message threads.  By
  default, messages with the same subject are grouped together in
  ``pseudo threads.''  This may not always be desirable, such as in a
  personal mailbox where you might have several unrelated messages with
  the subject ``hi'' which will get grouped together.

  6.3.119.  suspend

  Type: boolean
  Default: set

  When unset, mutt won't stop when the user presses the terminal's susp
  key, usually ``control-Z''. This is useful if you run mutt inside an
  xterm using a command like xterm -e mutt.

  6.3.120.  thorough_search

  Type: boolean
  Default: unset

  Affects the ~b and ~h search operations described in section
  ``Searching'' above.  If set, the headers and attachments of messages
  to be searched are decoded before searching.  If unset, messages are
  searched as they appear in the folder.

  6.3.121.  tilde

  Type: boolean
  Default: unset

  When set, the internal-pager will pad blank lines to the bottom of the
  screen with a tilde (~).
  6.3.122.  timeout

  Type: number
  Default: 600

  This variable controls the number of seconds Mutt will wait for a key
  to be pressed in the main menu before timing out and checking for new
  mail.  A value of zero or less will cause Mutt not to ever time out.

  6.3.123.  tmpdir

  Type: string
  Default: /tmp

  This variable allows you to specify where Mutt will place its
  temporary files needed for displaying and composing messages.

  6.3.124.  to_chars

  Type: string
  Default: " +TCF"

  Controls the character used to indicate mail addressed to you.  The
  first character is the one used when the mail is NOT addressed to your
  address (default: space).  The second is used when you are the only
  recipient of the message (default: +).  The third is when your address
  appears in the TO header field, but you are not the only recipient of
  the message (default: T).  The fourth character is used when your
  address is specified in the CC header field, but you are not the only
  recipient.  The fifth character is used to indicate mail that was sent
  by you.

  6.3.125.  use_8bitmime

  Type: boolean
  Default: unset

  Warning: do not set this variable unless you are using a version of
  sendmail which supports the -B8BITMIME flag (such as sendmail 8.8.x)
  or you may not be able to send mail.

  When set, Mutt will invoke ``$sendmail'' with the -B8BITMIME flag when
  sending 8-bit messages to enable ESMTP negotiation.

  6.3.126.  use_domain

  Type: boolean
  Default: set

  When set, Mutt will qualify all local addresses (ones without the
  @host portion) with the value of ``$hostname''.  If unset, no
  addresses will be qualified.

  6.3.127.  use_from

  Type: boolean
  Default: set

  When set, Mutt will generate the `From:' header field when sending
  messages.  If unset, no `From:' header field will be generated unless
  the user explicitly sets one using the ``my_hdr'' command.
  6.3.128.  use_mailcap

  Type: quad-option
  Default: ask

  If set to ``yes'', always try to use a mailcap entry to display a MIME
  part that Mutt can't understand what to do with.  If ``ask'', prompt
  as to whether to display as text or to use a mailcap entry.  If
  ``no'', always view unsupported MIME types as text.

  Note: For compatibility with metamail, Mutt will also look at the
  environment variable MM_NOASK.  Setting this to 1 is equivalent to
  setting use_mailcap to ``yes''.  Otherwise, the value of MM_NOASK is
  interpreted as a comma-separated list of type names (without white
  space) for which the corresponding mailcap entries will be used to
  display MIME parts without prompting the user for confirmation.

  6.3.129.  verify_sig

  Type: quad-option
  Default: yes

  If ``yes'', always attempt to verify PGP/MIME signatures.  If ``ask'',
  ask whether or not to verify the signature.  If ``no'', never attempt
  to verify PGP/MIME signatures.

  6.3.130.  visual

  Type: string
  Default: $VISUAL

  Specifies the visual editor to invoke when the ~v command is given in
  the builtin editor.

  6.3.131.  wait_key

  Type: boolean
  Default: set

  Controls whether Mutt will ask you to press a key after shell-escape,
  pipe-message, pipe-entry, print-message, and print-entry commands.

  It is also used when viewing attachments with ``autoview'', provided
  that the corresponding mailcap entry has a needsterminal flag, and the
  external program is interactive.

  When set, Mutt will always ask for a key. When unset, Mutt will wait
  for a key only if the external command returned a non-zero status.

  6.3.132.  write_inc

  Type: number
  Default: 10

  When writing a mailbox, a message will be printed every write_inc
  messages to indicate progress.  If set to 0, only a single message
  will be displayed before writing a mailbox.

  Also see the ``$read_inc'' variable.

  6.4.  Functions

  The following is the list of available functions listed by the mapping
  in which they are available.  The default key setting is given, and an
  explanation of what the function does.  The key bindings of these
  functions can be changed with the ``bind'' command.

  6.4.1.  generic

  The generic menu is not a real menu, but specifies common functions
  (such as movement) available in all menus except for pager and editor.
  Changing settings for this menu will affect the default bindings for
  all menus (except as noted).

  bottom-page                L   move to the bottom of the page
  current-bottom     not bound   move current entry to bottom of page
  current-middle     not bound   move current entry to middle of page
  current-top        not bound   move current entry to top of page
  enter-command              :   enter a muttrc command
  exit                       q   exit this menu
  first-entry                =   move to the first entry
  half-down                  ]   scroll down 1/2 page
  half-up                    [   scroll up 1/2 page
  help                       ?   this screen
  jump                  number   jump to an index number
  last-entry                 *   move to the last entry
  middle-page                M   move to the middle of the page
  next-entry                 j   move to the next entry
  next-line                  >   scroll down one line
  next-page                  z   move to the next page
  previous-entry             k   move to the previous entry
  previous-line              <   scroll up one line
  previous-page              Z   move to the previous page
  refresh                   ^L   clear and redraw the screen
  select-entry             RET   select the current entry
  tag-entry                  t   toggle the tag on the current entry
  tag-prefix                 ;   apply next command to tagged entries
  top-page                   H   move to the top of the page

  6.4.2.  index

  bounce-message             b   remail a message to another user
  change-folder              c   open a different folder
  change-folder-readonly ESC c   open a different folder in read only mode
  clear-flag                 W   clear a status flag from a message
  copy-message               C   copy a message to a file/mailbox
  create-alias               a   create an alias from a message sender
  decode-copy            ESC C   decode a message and copy it to a file/mailbox
  decode-save            ESC s   decode a message and save it to a file/mailbox
  delete-message             d   delete the current entry
  delete-pattern             D   delete messages matching a pattern
  delete-subthread       ESC d   delete all messages in subthread
  delete-thread             ^D   delete all messages in thread
  display-address            @   display full address of sender
  display-headers            h   display message with full headers
  display-message          RET   display a message
  exit                       x   exit without saving changes
  fetch-mail                 G   retrieve mail from POP server
  flag-message               F   toggle a message's 'important' flag
  forget-passphrase         ^F   wipe PGP passphrase from memory
  forward-message            f   forward a message with comments
  group-reply                g   reply to all recipients
  limit                      l   show only messages matching a pattern
  list-reply                 L   reply to specified mailing list
  mail                       m   compose a new mail message
  next-new                 TAB   jump to the next new message
  next-subthread         ESC n   jump to the next subthread
  next-thread               ^N   jump to the next thread
  next-undeleted             j   move to the next undeleted message
  next-unread        not bound   jump to the next unread message
  pipe-message               |   pipe message/attachment to a shell command
  previous-new         ESC TAB   jump to the previous new message
  previous-page              Z   move to the previous page
  previous-subthread     ESC p   jump to previous subthread
  previous-thread           ^P   jump to previous thread
  previous-undeleted         k   move to the last undelete message
  previous-unread    not bound   jump to the previous unread message
  print-message              p   print the current entry
  quit                       q   save changes to mailbox and quit
  read-subthread         ESC r   mark the current subthread as read
  read-thread               ^R   mark the current thread as read
  recall-message             R   recall a postponed message
  reply                      r   reply to a message
  save-message               s   save message/attachment to a file
  search                     /   search for a regular expression
  search-next                n   search for next match
  search-reverse         ESC /   search backwards for a regular expression
  set-flag                   w   set a status flag on a message
  shell-escape               !   invoke a command in a subshell
  show-version               V   show the Mutt version number and date
  sort-mailbox               o   sort messages
  sort-reverse               O   sort messages in reverse order
  sync-mailbox               $   save changes to mailbox
  tag-pattern                T   tag messages matching a pattern
  tag-thread             ESC t   tag/untag all messages in the current thread
  toggle-new                 N   toggle a message's 'new' flag
  toggle-write               %   toggle whether the mailbox will be rewritten
  undelete-message           u   undelete the current entry
  undelete-pattern           U   undelete messages matching a pattern
  undelete-subthread     ESC u   undelete all messages in subthread
  undelete-thread           ^U   undelete all messages in thread
  untag-pattern             ^T   untag messages matching a pattern
  view-attachments           v   show MIME attachments

  6.4.3.  pager

  bottom                     $   jump to the bottom of the message
  bounce-message             b   remail a message to another user
  change-folder              c   open a different folder
  change-folder-readonly ESC c   open a different folder in read only mode
  copy-message               C   copy a message to a file/mailbox
  create-alias               a   create an alias from a message sender
  decode-copy            ESC C   decode a message and copy it to a file/mailbox
  decode-save            ESC s   decode a message and save it to a file/mailbox
  delete-message             d   delete the current entry
  delete-subthread       ESC d   delete all messages in subthread
  delete-thread             ^D   delete all messages in thread
  display-address            @   display full address of sender
  display-headers            h   display message with full headers
  enter-command              :   enter a muttrc command
  exit                       i   return to the main-menu
  flag-message               F   toggle a message's 'important' flag
  forget-passphrase         ^F   wipe PGP passphrase from memory
  forward-message            f   forward a message with comments
  group-reply                g   reply to all recipients
  half-up            not bound   move up one-half page
  half-down          not bound   move down one-half page
  help                       ?   this screen
  list-reply                 L   reply to specified mailing list
  mail                       m   compose a new mail message
  mark-as-new                N   toggle a message's 'new' flag
  next-line                RET   scroll down one line
  next-message               J   move to the next entry
  next-new                 TAB   jump to the next new message
  next-page                      move to the next page
  next-subthread         ESC n   jump to the next subthread
  next-thread               ^N   jump to the next thread
  next-undeleted             j   move to the next undeleted message
  next-unread        not bound   jump to the next unread message
  pipe-message               |   pipe message/attachment to a shell command
  previous-line      BackSpace   scroll up one line
  previous-message           K   move to the previous entry
  previous-new       not bound   jump to the previous new message
  previous-page              -   move to the previous page
  previous-subthread     ESC p   jump to previous subthread
  previous-thread           ^P   jump to previous thread
  previous-undeleted         k   move to the last undelete message
  previous-unread    not bound   jump to the previous unread message
  print-message              p   print the current entry
  quit                       Q   save changes to mailbox and quit
  read-subthread         ESC r   mark the current subthread as read
  read-thread               ^R   mark the current thread as read
  recall-message             R   recall a postponed message
  redraw-screen             ^L   clear and redraw the screen
  reply                      r   reply to a message
  save-message               s   save message/attachment to a file
  search                     /   search for a regular expression
  search-next                n   search for next match
  search-reverse         ESC /   search backwards for a regular expression
  search-toggle              \   toggle search pattern coloring
  shell-escape               !   invoke a command in a subshell
  show-version               V   show the Mutt version number and date
  tag-message                t   tag a message
  toggle-quoted              T   toggle display of quoted text
  top                        ^   jump to the top of the message
  undelete-message           u   undelete the current entry
  undelete-subthread     ESC u   undelete all messages in subthread
  undelete-thread           ^U   undelete all messages in thread
  view-attachments           v   show MIME attachments

  6.4.4.  alias

  search                     /   search for a regular expression
  search-next                n   search for next match
  search-reverse         ESC /   search backwards for a regular expression

  6.4.5.  attach

  bounce-message             b   remail a message to another user
  decode-copy            ESC C   decode a message and copy it to a file/mailbox
  decode-save            ESC s   decode a message and save it to a file/mailbox
  display-headers            h   display message with full headers
  forward-message            f   forward a message with comments
  group-reply                g   reply to all recipients
  list-reply                 L   reply to specified mailing list
  pipe-entry                 |   pipe message/attachment to a shell command
  print-entry                p   print the current entry
  reply                      r   reply to a message
  save-entry                 s   save message/attachment to a file
  view-mailcap               m   force viewing of attachment using mailcap
  view-text                  T   view attachment as text

  6.4.6.  compose

  attach-file                a   attach a file(s) to this message
  copy-file                  C   save message/attachment to a file
  detach-file                D   delete the current entry
  display-headers            h   display message with full headers
  edit-bcc                   b   edit the BCC list
  edit-cc                    c   edit the CC list
  edit-description           d   edit attachment description
  edit-encoding             ^E   edit attachment trasfer-encoding
  edit-fcc                   f   enter a file to save a copy of this message in
  edit-file               ^X e   edit the file to be attached
  edit-headers               E   edit the message with headers
  edit-message               e   edit the message
  edit-mime                  m   edit attachment using mailcap entry
  edit-reply-to              r   edit the Reply-To field
  edit-subject               s   edit the subject of this message
  edit-to                    t   edit the TO list
  edit-type                 ^T   edit attachment type
  filter-entry               F   filter attachment through a shell command
  forget-passphrase         ^F   wipe PGP passphrase from memory
  ispell                     i   run ispell on the message
  new-mime                   n   compose new attachment using mailcap entry
  pgp-menu                   p   show PGP options
  pipe-entry                 |   pipe message/attachment to a shell command
  postpone-message           P   save this message to send later
  print-entry                l   print the current entry
  rename-file                R   rename/move an attached file
  send-message               y   send the message
  toggle-unlink              u   toggle whether to delete file after sending it
  view-attach              RET   view attachment using mailcap entry if necessary

  6.4.7.  postponed

  delete-entry               d   delete the current entry
  undelete-entry             u   undelete the current entry

  6.4.8.  browser

  change-dir                 c   change directories
  check-new                TAB   check mailboxes for new mail
  enter-mask                 m   enter a file mask
  search                     /   search for a regular expression
  search-next                n   search for next match
  search-reverse         ESC /   search backwards for a regular expression
  select-new                 N   select a new file in this directory
  sort                       o   sort messages
  sort-reverse               O   sort messages in reverse order

  6.4.9.  editor

  backspace          BackSpace   delete the char in front of the cursor
  backward-char             ^B   move the cursor one character to the left
  bol                       ^A   jump to the beginning of the line
  delete-char               ^D   delete the char under the cursor
  eol                       ^E   jump to the end of the line
  forward-char              ^F   move the cursor one character to the right
  history-down       not bound   scroll up through the history list
  history-up         not bound   scroll up through the history list
  kill-eol                  ^K   delete chars from cursor to end of line
  kill-line                 ^U   delete all chars on the line
  kill-word                 ^W   delete the word in front of the cursor

  7.  Miscellany

  7.1.  Acknowledgements

  Kari Hurrta <kari.hurtta@fmi.fi> co-developed the original MIME
  parsing code back in the ELM-ME days.

  The following people have been very helpful to the development of
  Mutt:

  Francois Berjon <Francois.Berjon@aar.alcatel-alsthom.fr>,
  Aric Blumer <aric@fore.com>,
  John Capo <jc@irbs.com>,
  Liviu Daia <daia@stoilow.imar.ro>,
  David DeSimone <fox@convex.hp.com>,
  Nickolay N. Dudorov <nnd@wint.itfs.nsk.su>,
  Michael Finken <finken@conware.de>,
  Sven Guckes <guckes@math.fu-berlin.de>,
  Mark Holloman <holloman@nando.net>,
  Andreas Holzmann <holzmann@fmi.uni-passau.de>,
  David Jeske <jeske@igcom.net>,
  Christophe Kalt <kalt@hugo.int-evry.fr>,
  Felix von Leitner (a.k.a ``Fefe'') <leitner@math.fu-berlin.de>,
  Brandon Long <blong@uiuc.edu>,
  Lars Marowsky-Bree <lmb@pointer.in-minden.de>,
  Thomas ``Mike'' Michlmayr <mike@cosy.sbg.ac.at>,
  David O'Brien <obrien@Nuxi.cs.ucdavis.edu>,
  Clint Olsen <olsenc@ichips.intel.com>,
  Park Myeong Seok <pms@romance.kaist.ac.kr>,
  Thomas Parmelan <tom@ankh.fr.eu.org>,
  Ollivier Robert <roberto@keltia.freenix.fr>,
  Allain Thivillon <Allain.Thivillon@alma.fr>,
  Ken Weinert <kenw@ihs.com>

  7.2.  About this document

  This document was written in SGML, and then rendered using the sgml-
  tools package.