Routing

 
We are forwarding a users emails to his Verizon.net account.  He can't
receive any messages that our Fax Maker server sends.  They get cault in
our Exchange Queues with a SMTP protocol error occurred.  The message
shows the fax number, of the sender, followed by @faxmker.com.  Verizon
says that the message probably fails the sender verify test.  We can
forward to gmail, yahoo, sbcglobal and hotmail with out any problems.
Any ideas?

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