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1994-03-14
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SMTPd SMTPd
NAME
SMTPd - SMTP Daemon for AS-225 release 2 and AmiTCP 2.2+
SYNOPSIS
SMTPd
DESCRIPTION
SMTPd is designed to be fully compatible with RFC-821 and process
most addresses accepted by RFC-822. It is an active daemon, in that
it listens to its port (normally 25), and is *not* initiated by
the INet daemon when an SMTP port open request occurs.
SMTPd accepts messages destined for the local host and delivers
them to the local mailbox. SMTPd will regularly (every two minutes)
retry previously failed mail which is present in the SMTP Spool
Directory (to avoid system thrashing, SMTPd will only allow one
retry to be active at a time).
SMTPd requires one external program to be present for its operation,
SMTPpost. SMTPpost *must* be in the program search path for SMTPd
when SMTPd is initiated.
SMTPd requires three environment variables to be assigned, or for
the variables to be defined in the configuration file (named
S:UUConfig or UULib:Config, in that order).
The variables are:
SMTPSpoolDir
SMTPMailDir
SMTPSmarterHost
SMTPMailDir points to where MailBoxes/Folders are located. It may
be shared with UUCP MailBoxes and Folders (they are the same format).
SMTPSpoolDir is the directory where SMTP spool files are to be
located. If SMTPpost cannot locate a destination host, it places
the articles in this directory, and retries sending the messages on
a regular basis. It *may not* be shared with UUSpool. The batch
files are a different format.
SMTPSmarterHost is the SMTP host where mail is sent if a named
destination host is not reachable. It is presumed to be an Internet
host which has better routing information than does the host
running this SMTPd.
The environment variables may be defined as:
Set SMTPMailDir UUMail:
Set SMTPSpoolDir UUStuff:SMTPSpoolDir/
Set SMTPSmarterHost Mail.SmarterHost.COM
INSTALLATION
Simply install the binaries for SMTPd and SMTPpost where-ever you
wish. Do note that SMTPpost *must* be in the path of SMTPd, whenever
SMTPd is started.
A sample script (StartSMTPd) for executing SMTPd is included in
the INetUtils archive.
DIAGNOSTICS
SMTPd always returns success, except when initialization fails.
If initialization fails, SMTPd returns a program value of thirty
(30).
Various problem conditions, as well as success conditions, are
logged to the standard INetUtils logfile (INet:Logfile).
NOTES
SMTPd delivered messages have been tested with AmigaUUCP, GMail,
AmigaElm, Unix Elm and BBX.
SMTPd is fully compatible with AmigaUUCP 1.16 and above. The
mailbox folders may be shared (that is, SMTPMailDir may point
to UUMail:).
The environment variables (or configuration variable) SMTPRMail
may be specified to indicate a special program to be used to
deliver incoming mail (AmigaUUCP does this with RMAIL). If
specified, SMTPd will start the program as follows:
SMTPRMAIL user@host <incoming-file-name
where SMTPRMAIL is the name of the program specified in the
environment variable, user@host is the incoming address, and
incoming-file-name is the (SMTPd generated) filename containing
the incoming message.
It is *highly recommended* that you do the following:
SetEnv SMTPRMail SMTPpost >nil: -r
for aliases to have any hopes of working properly.
If SMTPd does the filing itself, a command indicated by the
MAILREADYCMD environment variable will be executed. The format
of the command is:
MAILREADYCMD -x T:MailRdy
SMTPd will also send a signal to a program who has a message port
named "T:MailRdy" made public.
By default, SMTPd scans the SMTPSpoolDir every 2 minutes (120
seconds). SMTPd will *not* try to send a file until it is at
least twice that amount of time old (4 minutes). It will try to
resend files in the spool at 4 minute intervals. You may adjust
the scan time by using the SMTPDelay configuration variable. It
is settable in seconds. For example:
SetEnv SMTPDelay 30
will cause SMTPd to scan the spool every 30 seconds, and retry
files at one minute intervals.
The configuration variable SMTPRoute controls how SMTPd tries to
send mail. It may be set to either of "SMTP" or "SMARTERHOST".
When set to SmarterHost, all email is routed to the SmarterHost
specified (as described above). When set to SMTP, then SMTPd will
try to send to the host specified first, then to he SmarterHost.
BUGS/TODO
Lots yet on the TODO list.
No bugs known.
WARNING WILL ROBINSON! One AmiTCP beta tester reported data
loss. I cannot reproduce it. BE CAREFUL.
You have been warned.