Microsoft KB Archive/266792

= XCON: Exchange Server 5.5 Post-SP3 Message Transfer Agent May Stop Responding After Reporting Event ID 4283 =

Article ID: 266792

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Service Pack 3

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This article was previously published under Q266792





SYMPTOMS
In a site in which servers have many X.400 connections, some over slow lines, a message transfer agent (MTA) may log an event ID 4283 message that contains a description that is similar to the following:

Unable to recognize an internal message identifier. Internal connection handle (LPI) 1-15-4 Error code: 8465 [POP4 POP4 UP 6 228] (14)

The error code that the description quotes may also be 8464.

Then the MTA stops responding, and you must either stop the MTA manually or restart the server. This occurs in build 5.5.2651.61 or later of the MTA.



CAUSE
This problem can occur if there is an error in the way the MTA processes its internal control blocks.



RESOLUTION
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 to Obtain the Latest Exchange Server 5.5 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5 Service Pack 3. This problem was first corrected in Exchange Server 5.5 Service Pack 4.



MORE INFORMATION
The event ID 4283 message alone is not evidence that the problem that is described in this article is occurring.

The fix ensures that after these events are logged, control blocks are managed correctly so that the MTA does not become uncontrollable.

Additional query words: 4283 LPI hang

Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB266792

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