Microsoft KB Archive/247127

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Knowledge Base

XCON: Loop Detection and Associated NDR Fail in Some Situations

Article ID: 247127

Article Last Modified on 2/22/2007


  • Microsoft Exchange 2000 Server Standard Edition

This article was previously published under Q247127


When you send mail to a distribution list (DL) where some members are set up in a forwarding loop, the loop is not detected. As a result, a non-delivery report (NDR) is not generated as required by the loop detection design.


Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.


For example, UserA and UserB are members of a single DL. UserA has set up a forwarding rule to UserB and UserB has set up a forwarding rule to UserA. When a message is sent to the DL, message looping occurs but is not detected. Consequently, no NDR is generated.

Keywords: kbbug kbpending KB247127