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?