I have a client who has a SBS Server 2003 and has all staff using outlook
2003. They are all connected to the exchange server, and are only using it to
store email (for central backup) and shared calandars. Their email is done
through an externally hosted server and is accessed via POP3.

I realize this is not the best setup, but for right now they do not want to
host their own email.

The problem happens when USER1 sends an email to USER2 and it ends up
sending through the exchange server. USER2 then decides that they are going
to forward this email to an external user. Outlook tries to send it through
the exchange server, which of course goes nowhere.

Without having to manually change which account the email is being sent out
through is there a way to instruct outlook to always send email through the
external account instead of picking based on where it came from?

I'm by no means an exchange expert, so maybe this is an easy thing to fix.
Any and all ideas, or suggestions are very much welcome. If you see a better
way to do this I am open to all ideas.