We just switched over to new Windows 2003 servers and Exchange 2003. I have started the process of converting our users to Outlook 2003, but we came across a problem. The Outlook 2003 users are not able to reply to any messages from people outside of the company. They can send new emails to the outside world just fine. When they send a reply message, they immediately get a response email from "system administrator" with the following information:
Your message did not reach some or all of the intended recipients.
Subject: RE: test
Sent: 5/11/2005 11:21 AM
The following recipient(s) could not be reached:
"*******" on 5/11/2005 11:21 AM
550 not local host ******.com, not a gateway
Our Outlook 2000 clients can replay successfully to any email and don't seem to have this problem.
(I used ***** in the email body, where the email address and mail domain are actually listed)