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Microsoft KB Archive/175236

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Knowledge Base

XFOR: Failed Message Conversion Error on Inbound Messages

Article ID: 175236

Article Last Modified on 10/28/2006


  • Microsoft Exchange Server 5.0 Standard Edition

This article was previously published under Q175236


The Microsoft Exchange Server Internet Mail Service may fail to convert an incoming internet mail message.


This problem can be caused by the Internet Mail Service receiving messages with wrapped mail message headers. When the Internet Mail Service unwraps these headers it removes all spaces. Although this conforms to RFC, this creates a message with an invalid message header and thus the message cannot be processed.


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:


Additional query words: bounced message undeliverable mail

Keywords: kbbug kbfix KB175236