Mail not flowing to external addresses
Posted on 2008-10-28
Exchange server 2003 farm with 1 front end server. Email is flowing internally, and email is coming in from the outside. But, any email sent to sources outside of our domain are not going out. I'm not getting any error messages, or NDRs. All back end servers send their email via the front end. There are queues on the mail server called "messages with unreachable desinations" that have outgoing mail sitting in them. I cannot unfreeze, or force a connection for them. It seems to me that the back end servers are not finding the front end, and if they do the front end isn't sending anythign out.
Additional info: We've been playing with a 2007 Exchange server that was added to the system. i currently have it shut off.