[Exim] Forwarding to exposed mail server for outbound email

Hello,

Sorry for the newbie question, but I haven't found a guide on how to do
this either on the Exim site, or Google.

I have two servers (Exim 4.3 / Debian Sarge). One is exposed and is our
mail server. The other is a workgroup server and is therefore not
exposed. I would like to forward alerts, etc. from the workgroup server
to the exposed server for pickup.

AFAIK, I'm supposed to set up a smarthost on the exposed machine, and
point the workgroup server's router: config to it. I read the smart
host: example router article, but that only seems to cover the workgroup
server, and not the exposed server.

That's as far as I've gotten ;-P

Can anyone point me in the right direction?

Thanks in advance!

James