Email Error code 5.3.0 (Full Version)

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NomadicNerd -> Email Error code 5.3.0 (25.Mar.2009 11:54:55 PM)

One of our users received this error when sending out mail.
Why does this happen?

The following recipient(s) could not be reached: on 26/03/09 10:51am
    The message cannot be delivered due to a configuration error on the server.
    Please contact your Administrator.
    < #5.3.0 X-Unix; 73>


Nazim -> RE: Email Error code 5.3.0 (26.Mar.2009 1:12:15 AM)

This is NDR from a Unix server which is rejecting the message. It an issue at the recipient server end.

NomadicNerd -> RE: Email Error code 5.3.0 (26.Mar.2009 1:59:15 AM)


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