I have a single user that cannot send emails to anyone, internal or external. We are on exchange 2007 and he is using outlook 2007. His profile setup in outlook without any issues. He can receive email all day long from both internal and external senders. When he sends email it appears to be going but never actually gets sent. He does not get any NDR notices at all. I have deleted his mailbox, AD account and local profile and then recreated his entire user account and mailbox. I have tried sending email from OWA to determine if it was related directly with is outlook client and it will not send from OWA as well. Others users on this same server work just fine.
Any suggestions are greatly appreciated. I have already tried to mail flow troubleshooter on the server. It passes all test fine. The mail queues are all empty. I have looked in the logs and they do not contain anything about him even sending the message so it is like it never really reaches the server.