Microsoft KB Archive/146795

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

Article ID: 146795

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition

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This article was previously published under Q146795





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

Keywords: kbusage KB146795

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