Posts Tagged ‘#550 4.4.7 QUEUE.Expired’
Can’t email remote domain from Exchange
January 19th, 2009 | 
Author: Have you ever had email from one specific domain bounce back from Exchange with status code of: #550 4.4.7 QUEUE.Expired; message expired ##? I ran into this problem. It turned out the mail server on that domain was blocking email coming from our Exchange 2007 mail server. Here is what I did to narrow down the issue.
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