Install iRedMail (Fully Featured Mail Server) with Virtual Domains, Webmail, SpamAssassin & ClamAV in Linux

This tutorial will guide you through installing a full mail server with MTA, MDA and MUA software in a few minutes on RHEL, CentOS, Scientific Linux and Debian, Ubuntu, Linux Mint with Postfix, Virtual Domains and Users with MySQL, Dovecot  support for POP3/POP3S, IMAP/IMAPS, Roundcube  Webmail and also, mail spam and virus scanning with SpamAssassin and ClamAV, all installed using a single software package called iRedMail.