Microsoft KB Archive/264329

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XCON: Message Transfer Agent Stops Transferring Data After an X.25 Error

Article ID: 264329

Article Last Modified on 10/26/2006


  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q264329


The Exchange Server message transfer agent (MTA) may stop transferring messages through all X.400 connectors that use a X.25 Winsock stack, even if those connectors are available.


This issue can occur if multiple (two or more) X.25 Winsock stacks are configured and one link is down. When the X.25 Winsock driver returns an error to the MTA listen call, both links may stop transferring data.


To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How toObtain the latest Exchange Server 5.5 Service Pack


Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

Additional query words: X25 CIREL

Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB264329