I've got an SBS2003 server that I've just transfered a domain to.

the domain was hosted externally from the office and local users connected
via IMAP to the host with Outlook 2003.

I moved the MX record and setup exechange to receive email on the new
domain.


MX record transfer has been in effect for over 12 hours.

email flows in - but the issue is, not all email. it seems to be centered
around replies.

I suspect that it's replies to email sent when the domain was hosted
externally. and the header contains some information that is confusing
Exchange 2003 (on a SBS 2003 box)

I've seen something similar before and an adjustment to the X400 record to
acceppt the domain name regardless of previous header details would resolve
the issue - any ideas?