DOCUMENT:Q196663  23-OCT-2001  [exchange]
TITLE   :XCON: MTA Unable to Deliver NDR When Message Fails
PRODUCT :Microsoft Exchange
PROD/VER::5.5
OPER/SYS:
KEYWORDS:exc55 EXC55SP3Fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

Microsoft Exchange Server 5.5 does not deliver the non-delivery report (NDR) to
the original sender of the message if it encounters a message size limit on
another server's message transfer agent (MTA) in certain circumstances.

CAUSE
=====

The receiving server will generate a NDR for the message and send the report to
the sending server, which will attempt to reroute the message after triggering
the routing restricted value, eventually failing, and is then unable to complete
delivery.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server
version 5.5. For additional information, please see the following article in the
Microsoft Knowledge Base:

   Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or
later:

Component: Message Transfer Agent (MTA)

   File Name      Version
   -------------------------
   Dbserver.sch   5.5.2500.0
   Dcprods.cat    5.5.2500.0
   Ems_rid.dll    5.5.2500.0
   Emsmta.exe     5.5.2500.0
   Info4log.cfg   5.5.2500.0
   Infodlog.cfg   5.5.2500.0
   Infollog.cfg   5.5.2500.0
   Infotlog.cfg   5.5.2500.0
   Mtacheck.exe   5.5.2500.0
   Mtamsg.dll     5.5.2500.0
   P2.xv2         5.5.2500.0
   X400om.dll     5.5.2500.0
   X400omv1.dll   5.5.2500.0



STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5. This problem was first corrected in Exchange Server 5.5 Service
Pack 3.

Additional query words: rerouting failing

======================================================================
Keywords          : exc55 EXC55SP3Fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : :5.5
Issue type        : kbbug
Solution Type     : kbfix

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