While not a newbie myself to Linux or Windows or Exchange 2003, I seem to be having an issue.

I have a CentOS 5.3 server set up as you described in your posting. Mail gets forwarded to the Exchange box like it should with one exception. Mail from one domain apparently gets delivered to the Exchange Server machine ok after being scanned by amavis-new, but when I go to log into a certain mailbox on the Exchange server, the message is not in the inbox folder, nor is there any logging of the connection attempt. It seems that emails from other domains get relayed fine (with the exclusion of spam and virii). If anyone has any experience with this issue and has a possible solution, I would be thankful for any assistance I can get with this.

TIA!

What do the logs say?

/var/log/maillog

^ May have some clues...

-C

That's just it. The message gets delivered to the Exchange machine, but the Exchange machine does not even put the mail in the appropriate mailboxes.