XCON: Conditional Reroute on Single Link Bounces Back

• Microsoft Exchange Server, version 4.0

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

Additional query words:

Keywords : kbusage kbbug4.00 kbfix4.00.sp4 XCON
Version : winnt:4.0
Platform : winnt
Issue type : kbbug