DOCUMENT:Q225157  30-SEP-1999  [exchange]
TITLE   :XCON: MTA Stops Unexpectedly with Cirel Winsock X.400 Connection
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55 EXC55SP3Fix

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

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


SYMPTOMS
========

If you configure an X.400 Connector to use a Cirel Winsock X.25 card installed
in an Exchange Server computer, the Message Transfer Agent (MTA) may stop
unexpectedly. This problem is most likely to occur during heavy message traffic.

CAUSE
=====

This problem occurs when the Cirel Winsock transport sends a malformed buffer
into the stack. If the data is invalid, it should not be passed up the stack to
the MTA, but it is.

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: MTA

+---------------------------+
| File name    | Version    | 
+---------------------------+
| Dbserver.sch | N/A        | 
+---------------------------+
| Dcprods.cat  | N/A        | 
+---------------------------+
| Emsmta.exe   | 5.5.2586.0 | 
+---------------------------+
| Ems_rid.dll  | 5.5.2586.0 | 
+---------------------------+
| Infoblog.cfg | N/A        | 
+---------------------------+
| Infodlog.cfg | N/A        | 
+---------------------------+
| Infollog.cfg | N/A        | 
+---------------------------+
| Infoplog.cfg | N/A        | 
+---------------------------+
| Infotlog.cfg | N/A        | 
+---------------------------+
| Info4log.cfg | N/A        | 
+---------------------------+
| Mtacheck.exe | 5.5.2586.0 | 
+---------------------------+
| Mtamsg.dll   | 5.5.2586.0 | 
+---------------------------+
| P2.xv2       | N/A        | 
+---------------------------+
| X400Om.dll   | 5.5.2586.0 | 
+---------------------------+
| X400Omv1.dll | 5.5.2586.0 | 
+---------------------------+


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.

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

The User.dmp file may contain a call stack similar to the following:

FramePtr RetAddr Param1 Param2 Param3 Function Name
04c2fed4 00552d7c 00000014 04c2fef8 0413d940 EMSMTA!oppsscnc+0x7c
04c2ff08 0055a04f 00000014 0068cb4c 04005ec8 EMSMTA!oppsstdt+0x7d
04c2ff30 0055b991 04006848 0413d940 04005ec8 EMSMTA!oppssprc+0x97
04c2ff60 004aa742 00000014 00000320 00dcfd38 EMSMTA!oppsitps+0x13b
04c2ff8c 00471f1c 00dcfd38 00c606b0 00000014 EMSMTA!oppsin+0x208
04c2ffb8 77f04ee8 00000014 00dcfd38 00c606b0 EMSMTA!sbpiwbep+0x58
04c2ffec 00000000 00000000 00000000 00000000
KERNEL32!BaseThreadStart+0x51

The third-party products discussed in this article are manufactured by vendors
independent of Microsoft; we make no warranty, implied or otherwise, regarding
these products' performance or reliability.

Additional query words:

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

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

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