In this post I'll show you how to install an anti-spam smart host relay server, based on Ubuntu 12.04 LTS, that will include:
Postfix w/Bayesian Filtering and Anti-Backscatter (Relay Recipients via look-ahead), Apache2, Mysql, Dnsmasq, MailScanner (Spamassassin, ClamAV, Pyzor, Razor, DCC-Client), Baruwa, SPF Checks, FuzzyOcr, Sanesecurity Signatures, PostGrey, KAM, Scamnailer, FireHOL (Iptables Firewall) and Relay Recipients Script.
Continue reading for the instructions.