Microsoft KB Archive/151785

= XCON: MTA Queue Blocked by NDR or Delivery Receipts =

Article ID: 151785

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition
 * Microsoft Exchange Server 5.0 Standard Edition

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This article was previously published under Q151785



SYMPTOMS
An Exchange Server site that backbones over a foreign X.400 system to another Exchange Server site develops a message backlog for mail destined for the remote Exchange Server site. This message backlog is unrelated to any network communication problems. The message delivery problem may be unidirectional; that is, messages are being delivered from the remote site, but not to the remote site.



CAUSE
If a report message (that is, a non-delivery report [NDR], or a delivery receipt) is returned from the remote site and the foreign X.400 system used as a backbone adds unanticipated encoding for the property Report- Additional-Info, the message may block the MTA queue.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 4.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 4.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 5.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: blocked blockage hung stopped queues

Keywords: kbbug kbfix kbusage KB151785

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