Microsoft KB Archive/284374

= XCON: Exchange 2000 MTA Stops Transferring Data After an X.25 Error =

Article ID: 284374

Article Last Modified on 2/26/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q284374



For additional information about a similar problem that may occur in Microsoft Exchange Server version 5.5, click the following article number to view the article in the Microsoft Knowledge Base:

264329 XCON: MTA Stops Transferring Data After an X.25 Error



SYMPTOMS
If you set up two X.400 connectors that use the X.25 transport stack for redundancy and one link stops working, mail may not flow over the second link. When the two links are working, both connectors are correctly used. The following error message may be logged in the Application event log:

ID 4287

Category X.400 Service

Description: An internal MTA occurred. Contact Microsoft Product Support Services. Error code=8650 [POP4 POP4 DOWN4 18] (14)



CAUSE
This problem can occur if the message transfer agent (MTA) sets up two timer events for each timer event that the MTA processes. The MTA is so busy waiting for timer events that the MTA cannot fail over to the remaining good connector.



RESOLUTION
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 1.

Additional query words: emsmta.exe, cirel exch2kp2w

Keywords: kbbug kberrmsg kbfix KB284374

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