XCON: MTA Stops Unexpectedly with Cirel Winsock X.400 Connection

ID: Q225157

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

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Additional query words:

Keywords : exc55 EXC55SP3Fix
Version : winnt:5.5
Platform : winnt
Issue type : kbbug