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#5.5.0 smtp;501 Domain must resolve

Posted on 2007-03-27
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Last Modified: 2010-05-18
I have an Exchange 2003 Bo x that gerneally has no problem. However I sometimes get this error when sending an email...#5.5.0 smtp;501 Domain must resolve.  I figure it is a DNS error. What could the casue be and how do I fix it?
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Question by:degoodwin
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Sembee earned 125 total points
ID: 18801068
That usually means your server isn't announcing itself correctly.
Put your domain in to dnsreport.com and see if it flags any errors.

You may want to read my article on DNS configuration to ensure that everything is correct.

http://www.amset.info/exchange/dnsconfig.asp

Simon.
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