The Postfix SMTP server receives mail from the network and is exposed to the big bad world of junk email and viruses. This document introduces the built-in and external methods that control what SMTP mail Postfix will accept, what mistakes to avoid, and h
Disable your css before visiting! Mail server HOWTO - Postfix and Dovecot with MySQL and TLS/SSL, Postgrey and DSPAM
I have found that this is the easiest combination that allows you to serve Virtual Domains, and Users. With this it's also very easy to implement webmail systems like SquirrelMail.
