Outlook Express 5 – POP & SMTP?

I am connected to a state network
that has it’s own email system.
When I set up my account in Outlook
Ex. 5, what do I need to place in the
SMTP Server? Would that be based
on where my email account is (ex.
TechRepublic) or is that based on
the network to which my computer is
physically connected.

Also, if I was setting up Outlook so
that I could send mail to the author of
a TR article – which is where I was
going when this all started – What is
the correct url for the POP Server (ex.
mail.mac.com).

Please help!!!