iRedMail: Build A Full-Featured Mail Server On CentOS 6 With Postfix, Dovecot, PostgreSQL.

Build A Full-Featured Mail Server On CentOS 6 With Postfix, Dovecot, PostgreSQL

We’re going to set up a free, full-featured mail server on CentOS
6.2, all mail service related components are free and open source, and
you have control over your own data. The installation process is
extremly easy and smooth.