free- postfix + courier-imap
you could even run postifx and wu-imap, wu-imap comes with redhat. but you can setup courier-imap with postifx 2.x and give people email accounts without giving them user accounts on the system.
there are other MTA's you could use: 2 come to mind, sendmail and qmail. there are others i think, and they are all free. Not sure if they will run on Windows though.
Last edited by Robert0380; 10-28-2003 at 12:42 PM.