XFOR: Queued Message Waiting for ETRN Never Expires |
The information in this article applies to:
-
Microsoft Exchange Server, versions 5.0, 5.5
SYMPTOMS
Normally, when a message sent from a client is undelivered after the
scheduled time (message time-out value), the Microsoft Exchange Internet
Mail Service expires the message on the Internet Mail Service outbound
queue and returns a non-delivery report (NDR) to the sender. However, when
this problem occurs, the queued message, which is waiting for the ETRN
command, remains in the outgoing queue and never expires after the
scheduled time. The sender never receives an NDR.
CAUSE
Microsoft Exchange Server supports the use of an SMTP extension called
ETRN. An Exchange Server computer can be used as a host SMTP server and
will respond to ETRN commands from the remote host. After the remote host
submits the ETRN command to the Exchange Server computer, a new connection
is established from the Exchange Server computer to the remote host. The
Exchange Server computer keeps a message until it receives the ETRN command
from the remote host. If the queued message is waiting for the ETRN
command, the message never expires even after the scheduled time. Then the
sender never receives an NDR. The scheduled time is 48 hours for Normal
Message by default.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.0.
A supported fix is now available, but has not been fully regression-tested
and should be applied only to systems experiencing this specific problem.
Unless you are severely impacted by this specific problem, Microsoft
recommends that you wait for the next Service Pack that contains this fix.
Contact Microsoft Technical Support for more information.
This fix has been posted to the following Internet location:
ftp://ftp.microsoft.com/bussys/exchange/exchange-public/fixes/Eng/Exchg5.0/Post-SP2-IMS/
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5. This problem has been corrected in the latest U.S. Service
Pack for Microsoft Exchange Server version 5.5. For information about
obtaining the Service Pack, query on the following word in the Microsoft
Knowledge Base (without the spaces):
S E R V P A C K
Additional query words:
ISP RFC1985 SBS dialup DNS
Keywords : kbusage XFOR
Version : 5.0,5.5
Platform : WINDOWS
Issue type : kbbug
