I'm having an issue where my Exchange Edge Transport server receives mail (found in logs) and then it vanishes, never ending up in the users mailbox, I have a edge subscription setup between it and the main Exchange server, how can I go about tracing the message to figure out what is broken? I also have found records of the message in the logs on the main Exchange server. Thanks a ton for any help Edit: If I change port 25 on my main router to point to the main exchange server as opposed to the Edge Transport, email comes through fine form external domains and delivered in the correct mailbox