XADM: MAPI Messages Stack Up in Send Queue to the Host Specified in Forward Unresolved Recipients

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Article ID: 275596 - View products that this article applies to.
This article was previously published under Q275596
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When you specify a third-party Simple Mail Transfer Protocol (SMTP) server or Microsoft Exchange Server 5.5 in Forward all mail with unresolved recipients to host on the Messages tab of the SMTP Virtual Server properties, MAPI messages sent to unresolved recipients stack up in the send queue of the SMTP connector to the server.


This behavior is caused by Microsoft Exchange 2000 Server. When a MAPI message is sent to unresolved recipients, Exchange 2000 sends binary blob in the SMTP DATA command. The other SMTP server cannot finish receiving the message, and the message stays in the send queue.


To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
The Japanese version of this fix should have the following file attributes or later:

   Date         Time      Size      File name         Platform
   12/28/2000   9:58:13   901,120   Q275596engI.EXE   i386
After the hotfix is installed, the following files may have the listed attributes or later:
   Date         Time      Version       Size      File name    Platform
   01/12/2000    2:14:56   6.0.4418.50   586,240   Phatcat.dll  i386


Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 1.


Article ID: 275596 - Last Review: October 21, 2013 - Revision: 1.3
  • Microsoft Exchange 2000 Server Standard Edition
kbnosurvey kbarchive kbbug kbfix kbqfe KB275596

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