DOCUMENT:Q166026  02-MAY-1999  [exchange]
TITLE   :XADM: Malformed Message Causes AV in Information Store
PRODUCT :Microsoft Exchange
PROD/VER:WinNT:4.0,5.0
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0 
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SYMPTOMS
========

The Microsoft Exchange Server versions 4.0 or 5.0 information store may stop
responding and you receive a Dr Watson error message. An access violation
C0000005 error is logged in the Drwtsn32.log.

CAUSE
=====

The error occurs because of a malformed message when a POP3 client tries to
retrieve the message.

WORKAROUND
==========

Log on to the mailbox using the Microsoft Exchange or Outlook Client, delete the
message that is causing the crash, if possible, and then restart the information
store.

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

This is an extract of a message that will cause this problem:

   Content-Type: TEXT/PLAIN; charset=US-ASCII
   sender abcdef@xyz.abc.com )

The second line causes the problem to occur. If you manually remove this line in
the message, it processes correctly.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. This problem has been corrected in the latest U.S. Service Pack for
Microsoft Exchange Server version 4.0. 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

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version
5.0. This problem has been corrected in the latest U.S. Service Pack for
Microsoft Exchange Server version 5.0. 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: crash
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Keywords          :  
Technology        : kbExchangeSearch kbExchange500 kbExchange400 kbZNotKeyword2
Version           : WinNT:4.0,5.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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Copyright Microsoft Corporation 1999.