DOCUMENT:Q246302 11-NOV-2000 [exchange] TITLE :XCON: MTA Stops When Receiving Message from Foreign MTA PRODUCT :Microsoft Exchange PROD/VER:winnt:5.5 OPER/SYS: KEYWORDS:exc55 kbExchange550preSP4fix kbExchange550sp4Fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 ------------------------------------------------------------------------------- SYMPTOMS ======== When a foreign message transfer agent (MTA) sends a large message using a large initial checkpoint followed by much smaller checkpoints, the MTA on the Exchange Server computer may stop unexpectedly and the following event may appear in the event log: Event ID: 9405 Description: An unexpected error has occurred which may cause the MTA to terminate. This issue is known to occur with a Software and Systems Engineering, Ltd. (SSE) X.400-MIL MTA running on a Siemens RM600 computer, but it may also occur with any other MTA that behaves in this same manner. CAUSE ===== The Exchange Server MTA uses the initial checkpoint size to determine how to decode the data it receives from the foreign MTA. If the initial checkpoint is large, and then subsequent checkpoints are considerably smaller, this may prevent the Exchange Server MTA from properly decoding the data it receives. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Exchange Server 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 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 4. MORE INFORMATION ================ 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: crash hang ====================================================================== Keywords : exc55 kbExchange550preSP4fix kbExchange550sp4Fix Technology : kbExchangeSearch kbExchange550 kbZNotKeyword2 Version : winnt:5.5 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.