I'm doing research on setting up a new mail server for my company. We have a Dell PowerEdge 1600SC server and I want to put Linux on it. I've searched the forums and saw posts from 2001 and 2002 discussing sendmail, qmail, postfix, etc... This being 2005, I was wondering what the best solution is. I want a secure, spam-free (or as spam-free as possible) email environment for my clients. We have several virtual domains, and approximately 200 email accounts set up on our current server. Any suggestions would be greatly appreciated!!