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Exchange Server Error 550 5.7.1

Posted on 2003-10-28
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Last Modified: 2010-04-08
One user on our system can only send emails to internal addresses.  Outside addresses get an error 550 5.7.1 Unable to relay for xxxx@xxxx.com  What is the cause of this problem and how do I resolve this issue?
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Question by:egenerose
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