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Q140940: XFOR: IMC: 821 Routing Email Addresses Cause NDRs

Article: Q140940
Product(s): Microsoft Exchange
Version(s): 4.0
Operating System(s): 
Keyword(s): kbusage
Last Modified: 13-MAR-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 4.0 
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SYMPTOMS
========

Messages received into the Microsoft Exchange Internet Mail Connector (IMC) that
include 821 source routing prefixing the SMTP address will result in an
Non-Delivery Report (NDR).

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. This problem was corrected in Microsoft Exchange Server 4.0 U.S.
Service Pack 2. 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

MORE INFORMATION
================

An example of 821 source routing prefixing an SMTP address would be:

  <jcool%p.nuts.org@comic.nuts.org@comic.nuts.org:jcool@p.nuts.org>

Characters preceding and including the ":" comprise the 821 routing prefix. The
IMC would fail resolving this address to an SMTP proxy address.

The IMC now looks for 821 routing on all MAIL FROM: and RECEIPT TO: fields and
strips it if it exists.

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Keywords          : kbusage 
Technology        : kbExchangeSearch kbExchange400 kbZNotKeyword2
Version           : 4.0

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