Microsoft KB Archive/916986

= Exchange Server 2003 receives messages but sent messages are queued when you use the Exchange Server MTA to connect to a third-party MTA over an X.400 connector =

Article ID: 916986

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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SYMPTOMS
You use the Microsoft Exchange Server 2003 message transfer agent (MTA) to connect to a third-party MTA over an X.400 connector. When you do this, Exchange Server 2003 receives messages successfully as expected. However, Exchange Server 2003 cannot send messages over the X.400 connector. Instead, sent messages are queued in Exchange Server 2003.



CAUSE
This problem occurs because Exchange Server 2003 incorrectly sends proprietary routing data to non-Exchange Server MTAs.

This proprietary routing information cannot be interpreted by the third-party MTA. Therefore, the third-party MTA may stop communicating with Exchange Server. Therefore, the Exchange Server MTA queue becomes filled with many routing packets that are not accepted by the third-party MTA. Also, Exchange Server may have many messages queued for delivery because the third-party MTA refuses additional traffic from Exchange Server.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
Because of file dependencies, you must have Microsoft Exchange Server Server 2003 Service Pack 2 (SP2) installed to apply this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement
You do not have to restart your computer after you apply this hotfix. However, the Microsoft Exchange Server MTA Stacks service together with its dependent services are automatically stopped and then restarted when you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfix.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

817903 New naming schema for Exchange Server software update packages

Additional query words: XADM

Keywords: kbhotfixserver kbqfe kbfix kbbug kbpubtypekc KB916986

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