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Q161711: XCON: Messages NDR Rather Than Being Queued for Later Delivery

Article: Q161711
Product(s): Microsoft Exchange
Version(s): winnt:4.0
Operating System(s): 
Keyword(s): kberrmsg kbprogramming kbusage
Last Modified: 12-APR-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 4.0 Service Packs 1, 2 
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SYMPTOMS
========

When a message is sent to a recipient in another site by means of a Site
Connector, if the destination server is down, the message may be returned by the
System Administrator as undeliverable, with the following error message:

  The recipient could not be processed due to congestion in the message
  transfer service.

CAUSE
=====

The above symptoms will occur if there is an alternate Site Connector for the
message to travel over, but the path from the alternate site to the destination
server is also unavailable. The message will be re-routed to the alternate site,
and then returned to the sender undeliverable as above.

STATUS
======

Microsoft has confirmed this to be a problem in Exchange Server 4.0. This
problem was corrected in the latest Microsoft Exchange 4.0 U.S. Service Pack.
For information on 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:

======================================================================
Keywords          : kberrmsg kbprogramming kbusage 
Technology        : kbPTProdChange kbExchangeSearch kbZNotKeyword2
Version           : winnt:4.0
Issue type        : kbbug
Solution Type     : kbfix

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