DOCUMENT:Q282275  08-MAY-2002  [exchange]
TITLE   :XCON: MTA Stops Unexpectedly in CheckRecipInfo()
PRODUCT :Microsoft Exchange
PROD/VER::5.5 SP4
OPER/SYS:
KEYWORDS:kbExchange550preSP5fix

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 SP4 
-------------------------------------------------------------------------------


SYMPTOMS
========

The Exchange Server version 5.5 Service Pack 4 (SP4) message transfer agent
(MTA) may stop unexpectedly with a call stack that is similar to the following:

   

   FramePtr  RetAddr   Param1   Param2   Param3   Function Name
   0431f430  004b4ece  01e78f00 00000000 00000007 EMSMTA!CheckRecipInfo+0x7b
   0431f474  00423d92  00000002 00000007 01eefce8 EMSMTA!TrackRecipInfo+0x103
   0431ff24  00451bad  00000013 00000007 006955a8 EMSMTA!obpechve+0x48f
   0431ff44  0043e89c  00000013 00000000 0431ff8c EMSMTA!otpirtcf+0x92
   0431ff54  004a4cb4  00000013 00000024 000002f8 EMSMTA!otpixfok+0x66
   0431ff8c  0046da1e  00000024 00000115 00000013 0x004a4cb4
   0431ffb8  77f04ee8  00000013 00000024 00000115 EMSMTA!sbpiwbep+0x58
   0431ffec  00000000  00000000 00000000 00000000 KERNEL32!BaseThreadStart+0x51

When the MTA stops, it logs an error message that is similar to the following:

   Event ID: 9405
   An unexpected error has occurred which may cause the MTA to terminate. Error:
   Access violation (0xc0000005) at Address 0x4b5e39 reading from 0x0. [BASE
   XFER-IN 20] (16)

CAUSE
=====

This problem can occur if an Exchange Server 5.5 SP4 MTA on which message
tracking is enabled attempts to process a message with a distinguished name that
contains the following string:

   DDA:

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Microsoft Exchange Server 5.5 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information about support costs, please go to the following
address on the World Wide Web:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal support costs will apply to additional
support questions and issues that do not qualify for the specific update in
question.

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

Component: MTA

+----------------------------+
| File name    | Version     | 
+----------------------------+
| Dbserver.sch | N/A         | 
+----------------------------+
| Dcprods.cat  | N/A         | 
+----------------------------+
| Emsmta.exe   | 5.5.2654.39 | 
+----------------------------+
| Ems_rid.dll  | 5.5.2654.39 | 
+----------------------------+
| Infoplog.cfg | N/A         | 
+----------------------------+
| Mtacheck.exe | 5.5.2654.39 | 
+----------------------------+
| Mtamsg.dll   | 5.5.2654.39 | 
+----------------------------+
| Mtaperf.dll  | 5.5.2654.39 | 
+----------------------------+
| P42.tpl      | N/A         | 
+----------------------------+
| P772.tpl     | N/A         | 
+----------------------------+
| P2.xv2       | N/A         | 
+----------------------------+
| X400om.dll   | 5.5.2654.39 | 
+----------------------------+



WORKAROUND
==========

To work around this problem, turn off message tracking to continue to process
mail effectively.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5 Service Pack 4.

Additional query words:

======================================================================
Keywords          : kbExchange550preSP5fix 
Technology        : kbExchangeSearch kbZNotKeyword2 kbExchange550SP4
Version           : :5.5 SP4
Issue type        : kbbug
Solution Type     : kbfix

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

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