E-Mail Proxy?

[Justin P. Michel]

Greetings,

I have a FreeBSD 5.1 server running, and it's acting as a NAT server for an internal network. It's also running SAMBA, and acting as a back-up server.  What I would like to do is have e-mail accounts on the FreeBSD server, that, fetch e-mail from regular accounts (POP3) on another server, from the Internet.  Then, users on the LAN would set their e-mail clients to receive mail from the FreeBSD server.

Thus, I would still have a copy of all the e-mail on the FreeBSD server for back-up.

Is this possible/feasible?  And, which ports should I be looking at?  Even better, if there is a web page with setup info from someone that has already done this, please forward me the URL.

Regards,

Justin P. Michel
-- J Continuum