off topic - Emails From MSN Hotmail Live bouncing to certain domains

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  I have a few clients all who use Exchange 2003 that cannot receive emails from hotmail and other Microsoft mail servers.

   

  The clients can send to Microsoft domains but a reply or new message always fails.   The message does not reach the target servers.

   

  From hotmail:

   

  Reporting-MTA: dns;blu139-omc2-s22.blu139.hotmail.com
  Received-From-MTA: dns;BLU135-W28
  Arrival-Date: Mon, 18 Feb 2008 09:54:10 -0800

  Final-Recipient: rfc822;theitmachine@somedomain.org
  Action: failed
  Status: 5.5.0
  Diagnostic-Code: smtp;554 Transaction Failed (1022769381:189:-2147467259)

   

   

  I have tested the target domain (obviously changed) it passes Reverse DNS and other checks suggested as problems from various tech support sites.

   

  This appears to be a hotmail issue.  

   

  Thoughts?

   

  Monday, February 18, 2008 6:12 PM