We have a remote location with one Workstation (XP SP2) with Outlook 2003 SP2. We let this workstation (192.168.2...) logon to our domain (192.168.1...) in our main office . We had the router on our remote location configured to use the DNS of our main office (192.168.1.11). This is also the Exchange 2003 Server. The problem is that the Outlook client doesn't sent mail to external e-mail adresses. We can mail to our internal domain adresses and the Outlook client is able to receive the smtp e-mail. We have tried to change the outgoing smpt server (192.168.1.11) in Outlook to our providers e-mail server adress (smtp.provider.com) No luck.
Perhaps someone can help us to get this working.