550 5.7.1 when replying to Exch 2000

[eagriffin]

I have two domains (two trees in a forest) using one Exchange site. One domain has a problem with (I believe) its recipient policy. I have two recipient policies in addition to the default - one for mailboxes on each of two servers (hence each of the two domains). I have one MX record that sends all mail addressed to domain.edu to server1. I have an alias that points addomain1.domain.edu to the same server. The policy shows as the primary SMTP address addomain1.domain.edu. When SOME users try to communicate with SOME external mail systems, their correspondents get the beloved 550 5.7.1 unable to relay message when they hit "reply". The message shows the server name of the mail server their account is on (not too cool, in my opinion).

I just changed the policy that applies to their server to have the primary SMTP address as domain.edu. Do you think this is the answer to this problem?

 

[Xybertron]

Are they MAPI clients or Outlook Express? Dan
Microsoft Exchange Support @ Microsoft

 

[eagriffin]

The clients are anything they want them to be (students - can't live with 'em...) but one of the affected students who is testing it with me is using OWA to send the mail. As to the clients on the receiving end with the reply problems, they are primarily (and perhaps exclusively) non-MAPI, non-Microsoft systems (UNIX, LINUX, MacOS running Pine or some OS-based mail client, perhaps chiseling in stone, I'm not really sure). One more clue...the header information is different in mail sent from the problem domain than that of the domain that functions correctly. The return path is buried in the header for the problematic ones, and on the first line of the header for the group that works.