Postfix Spam Control

Here are some tools that can stop spam mails in postfix mail server

SecuritySage.com - good collection of HOW-TO on stoping spam mails on postfix mail server.

Postfix anti-UCE configuration - Jim Seymour's suggestions/examples for Postfix anti-UCE configuration.

Policy Daemon - Policyd is an anti-spam plugin for Postfix (written in C) that does Greylisting, Sender-(envelope, SASL or host / ip)-based throttling (on messages and/or volume per defined time unit), Recipient rate limiting, Spamtrap monitoring / blacklisting, HELO auto blacklisting and HELO randomization preventation.

Greylist Policy Service for postfix - Greylisting is a new weapon to use against spam in this great war being waged upon it. With this new shielding method, by which you may block out huge amounts of spam, you are sure to please your email clients!

SPF for postfix - libspf2 implements the Sender Policy Framework, a part of the SPF/SRS protocol pair. libspf2 is a library which allows email systems such as Sendmail, Postfix, Exim, Zmailer and MS Exchange to check SPF records and make sure that the email is authorized by the domain name that it is coming from. This prevents email forgery, commonly used by spammers, scammers and email viruses/worms.

Weighted policy daemon for postfix - A perl script for the postfix MTA (2.1 and later) to eliminate most forged envelope sender and HELOs (i.e. Bogus Mails). Allows you to score DNSBLs (RBL/RHSBL), HELO, MAIL FROM, Client IP Addresses before any queuing is done. Allows you to REJECT messages which have a score higher than allowed. And thus provides evaluated blocking of faked spam and virus mail.