Microsoft KB Archive/164836

= XCON: Conditional Reroute on Single Link Bounces Back =

Article ID: 164836

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition

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This article was previously published under Q164836



SYMPTOMS
When messages are received from foreign X.400 systems, sometimes the messages cannot be resolved against the Directory Service (DS). These messages are marked as rerouted and sent back to the foreign X.400 system.

This then starts a ping-pong effect between the two systems.



CAUSE
Some X.400 systems cannot handle the fact that the message is marked as REROUTED up the same link as the message was sent. Because they cannot loop detect the message, they consequently resend the message back to Microsoft Exchange, starting the ping-pong effect.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange version 4.0.

This problem was corrected in the latest Microsoft Exchange 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base:

SERVPACK

Keywords: kbbug kbfix kbusage KB164836

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