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Email undeliverable to Exchange 2003.  Requested action not taken: mailbox unavailable

David Barman
David Barman asked
on
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Last Modified: 2012-06-27
We have an Exchange 2003 server, SP2 and we have someone with that cannot send us email.  The undeliverable message that they receive is:   550    Requested action not taken: mailbox unavailable

The only thing that I see that is out of the ordinary and their email address has an apostrophe in the address.  Could this be causing a problem?

Any help would be appreciated.
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