DOCUMENT:Q197281 13-JUL-2000 [exchange] TITLE :XCON: MTA Can Stop After Generating an Event ID 9405 PRODUCT :Microsoft Exchange PROD/VER:winnt:5.5 SP1 OPER/SYS: KEYWORDS:exc55sp2fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 SP1 ------------------------------------------------------------------------------- SYMPTOMS ======== The Exchange Server message transfer agent (MTA) may generate an event with the following text: Source: MSExchangeMTA Event ID: 9405 Description: An unexpected error has occurred which may cause the MTA to terminate. Error: ExchHeapFree failure 87. [BASE DISP:FANOUT 12] (16) These events are sometimes associated with the MTA when it appears to stop processing messages, and you must stop the service from Task Manager and restart it to resume message flow. The Calls.out file may indicate that the Process Heap status entry, Heap 0x01070000, owned by MTA routine 142, is invalid. CAUSE ===== The MTA can encounter problems if it is configured to generate content encoding for a size of 2 KB, which is turned on when the heuristics bit is set. This setting is used to accommodate other X.400 MTAs that are unable to handle content encoded to larger sizes. The heuristics bit for 2 KkB-encoding is 256. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more 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 5.5.2441.0 Dcprods.cat 5.5.2441.0 Ems_rid.dll 5.5.2441.0 Emsmta.exe 5.5.2441.0 Info4log.cfg 5.5.2441.0 Infodlog.cfg 5.5.2441.0 Infollog.cfg 5.5.2441.0 Infotlog.cfg 5.5.2441.0 Mtacheck.exe 5.5.2441.0 Mtamsg.dll 5.5.2441.0 P2.xv2 5.5.2441.0 X400om.dll 5.5.2441.0 X400omv1.dll 5.5.2441.0 STATUS ====== Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5 Service Pack 1. This problem was first corrected in Exchange Server 5.5 Service Pack 2. Additional query words: ====================================================================== Keywords : exc55sp2fix Technology : kbExchangeSearch kbZNotKeyword2 kbExchange550SP1 Version : winnt:5.5 SP1 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.