We are in the process of upgrading from Exchange 2003 to 2010. Most things have gone very well, but the Exchange 2003 server is not routing email to the Exchange 2010 server and I believe this is because a smarthost is configured on the 2003 box.
When I send an email from a 2010 user the 2003 user received the email. When I reply to the email, message tracking indicates that the message is first being sent to the journaling mailbox and then out to the MXLogic smarthost. On the 2003 box there is only the default SMTP Virtual Server and it is configured to send all mail out to the smarthost - is this the issue? I suspect it is, but in the interim how do I configure 2003 to first use the routing group connectors and then send to the external smart host?
Thanks for any help you can offer.