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Q146795: XFOR: IMC Messages Left in \Imcdata\Out Directory

Article: Q146795
Product(s): Microsoft Exchange
Version(s): winnt:4.0
Operating System(s): 
Keyword(s): kbusage
Last Modified: 19-MAR-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 4.0 
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SYMPTOMS
========

When the Microsoft Exchange Internet Mail Connector (IMC) fails to resolve the
destination host for a message because the chain of CNAME records is greater
that eight records long, the message will not be returned with a Non-Delivery
Report (NDR). Instead, it will sit in the \Imcdata\Out subdirectory in retry
mode.

MORE INFORMATION
================

The following is a chain of CNAME records from a sample DNS server:

  cname0of8.test.microsoft.com.   IN CNAME
  cname1of8.test.microsoft.com.
  cname1of8.test.microsoft.com.   IN CNAME
  cname2of8.test.microsoft.com.
  cname2of8.test.microsoft.com.   IN CNAME
  cname3of8.test.microsoft.com.
  cname3of8.test.microsoft.com.   IN CNAME
  cname4of8.test.microsoft.com.
  cname4of8.test.microsoft.com.   IN CNAME
  cname5of8.test.microsoft.com.
  cname5of8.test.microsoft.com.   IN CNAME
  cname6of8.test.microsoft.com.
  cname6of8.test.microsoft.com.   IN CNAME
  cname7of8.test.microsoft.com.
  cname7of8.test.microsoft.com.   IN CNAME
  cname8of8.test.microsoft.com.
  cname8of8.test.microsoft.com.   IN CNAME
  test.microsoft.com.

If you compose a message to user@cname0of8.test.microsoft.com, the message will
not be NDR'd. The message will sit in the \Imcdata\Out subdirectory in the retry
mode. If you check the status of the message, it will report that there was a
network error.

STATUS
======

Microsoft has confirmed this to be a problem in version 4.0 of Microsoft
Exchange. We are researching this problem and will post new information here in
the Microsoft Knowledge Base as it becomes available.

Additional query words: InCon IMC Exchange internet mail DNS CNAME

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Keywords          : kbusage 
Technology        : kbExchangeSearch kbExchange400 kbZNotKeyword2
Version           : winnt:4.0

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