I noticed this morning that my Exchange 2010 Edge Transport server is not sending emails to my backend Exchange 2010 server (which hosts all remaining roles). Tyring to figure out what may be causing this issue.
Checked the event logs of both servers and nothing is being reported there that can help me. Performed message Tracking on both servers. The edge server reports that it is in fact "RECEIVE" emails from the backend Exchange server and is successfully sending them. However it reports that it is only "RECEIVE" external emails destined for the backend Exchange server (Internal users) but it shows now entry of even an attempt to "SEND" the emails destined to internal users.
My backend exchange server is working fine and is sending and receiving just fine for all internal users and is sending emails destined for external addresses to my edge server. But it is showing that no emails are being received from the Edge server.
What could be the possible cause of this?