I am setting up a home network using redhat linux, windows 2000 & windows 2003. I am not experienced in Linux. I have successfully made Windows 2000/2003 talk to each other and are able to view the webpages of each server using IIS. Eventually I will attemp to setup up exchange 2003 for both windows server. What email server application for redhat is the most easiest to use and also are there any materials online that can help me make my Redhat, windows 2000/2003 servers work successfully with each other. My goal is to be able to view intranet webpages from all three servers and also be able to send emails to each other. I am very lost with Redhat linux, thanks!

Your question isn't horribly specific, but I'll take a stab at it:

Viewing Web pages shouldn't be a problem. It's a simple HTTP transaction. So long as the Linux machine can connect to port 80 (or whatever port the Web server runs on) on the Windows machine, and vice versa, you're fine.

As for e-mail, Exchange uses a lot of proprietary Microsoft glop that any *nix mail server is probably not going to be able to interact with (e.g. calendering and the like). In terms of just sendinh/receiving mail, however, it's all just SMTP. In fact, I've heard of companies that route all incoming mail through a Linux server running Sendmail or another *nix mail server package which passes the mail through ClamAV and then sends it on to the Exchange server if it's clean.