We went through a successful domain rename about a month ago. We are running Server 2003 and Exchange 2003 in native mode. As a final clean up step and after some experimentation I recently changed the x.400 address to reflect the new company name. That turned out to be a bad idea. We are able to send and receive mail internally and externally with only one problem, we are unable to send messages to company contacts (employees in other divisions) listed in Exchange. Non-company contacts in Exchange function normally.
More background: All employees have the same SMTP suffix. All inbound and outbound mail is routed through corporate servers which have a list of all employees and their respective divisional servers. An employee’s e-mail address might be John.Doe@Company.com. The corporate servers forward the message to the recipients’ divisional server by adding the division to the address. John.Doe@Division.Company.
com When I send a message to a recipient in another division, the message goes to the corporate servers then out to the appropriate divisional server.
We receive the following NDR message instantaneously every time a message is sent to an company contact in Exchange:
Your message did not reach some or all of the intended recipients.
Subject: Test from Division
Sent: 5/4/2006 5:11 PM
The following recipient(s) could not be reached:
Test User on 5/4/2006 5:14 PM
A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.
I have already tried this from Microsoft but it didn't work:
Also tried changing a recipient policy that had the "This Exchange Organization is responsible for all mail delivery to this address" checked but that didn't work either.