Microsoft KB Archive/300445

= MTA Transfers Mail Slowly or Stops and Event IDs 1294, 2253, 4284, 9156, and 9202 Appear =

Article ID: 300445

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q300445



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
After you upgrade your servers from Exchange Server version 4.0 Service Pack 4 to Exchange Server version 5.5, the message transfer agent (MTA) may process mail slowly over X.400 connectors or may even stop. The event log may display the following information about Event IDs 1294, 2253, 4284, 9156, and 9202:

Event ID: 1294

Source: MSExchangeMTA

Category: X.400 Service

Event ID: 2253

Source: MSExchangeMTA

Category: Directory Access

Event ID: 4284

Source: MSExchangeMTA

Category: X.400 Service

Event ID: 9156

Source: MSExchangeMTA

Category: Resource

Event ID: 9202

Source: MSExchangeMTA

Category: Warning



CAUSE
This behavior can occur if too few control blocks are available for the message transfer agent (MTA) to use to transfer messages over multiple X.400 connectors.



RESOLUTION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

 Start Registry Editor (Regedt32.exe). Locate the TCP/IP control blocks value under the following key in the registry:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeMTA\Parameters

 Edit the value of the TCP/IP control blocks so that it is equal to (10 * the number of X.400 connectors) + (number of sites). Quit Registry Editor. Quit and then restart the MTA service.</ol>

Keywords: kbprb KB300445

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