Problems with Inbound POP amil being routed back out

I am trying to solve a mail routing problem.

I have a SBS 2003 using Exchange 2003.

My Users have external POP accounts at another ISP. I
setup the accounts in the POP3 Connector to be downloaded
and configured the SMTP Virtual Server to send the
outbound mail to the external domains directly (No Smart
host).

The errors depend on how I configure the user's email
accounts. If I configure the accounts to use the internal
domain as their email domain (user@domain.local), the
mail is refused by the external SMTP servers for the
domain being non-existent. If I setup their external
accounts(user@ispdomain.com) as the primary email
accounts, the inbound mail is routed back out to the
internet by the POP Mail Connector (Event Log reads: "The
message <id: {XXXXXX_XXXX_XX_XXX}> was routed to
<user@ispdomain.com> by an individual mailbox mapping.")

I would like their email to show their ispdomain.com
email addresses for all replies.

Thanks for your help

itsupport
Tue Jan 06 07:36:05 CST 2004

Hi Ernie,
I'm sorry I can't supply the answer to your problem, but I'd be delighted when someone does, cos I think this is the same issue that I am struggling with.
I'd really appreciate it if you could drop me a quick email if/when you work it out (I'll do the same if I crack it!)
Regards
Andy