PUBLIC MARKS from falko with tag greylisting

This tutorial shows how to set up an Ubuntu Hardy Heron (8.04 LTS) based server as a spamfilter in gateway mode. In the end, you will have a SpamSnake Gateway which will relay clean emails to your MTA. You will also be able to view your incoming queue, train your SpamSnake and carry out a few more advanced operations via MailWatch.

In this guide you will learn how to tweak your virtual Postfix setup to better combat SPAM by stopping the mail before it hits SpamAssassin, using RBL (Realtime Blacklists) and RHBL (slightly different), greylistings and Helo Checks.

This tutorial will show you how to setup greylisting with Postgrey and Postfix on Debian. Greylisting will not replace spam filtering software like SpamAssassin but it will serve as a powerful first hurdle for spam thus reducing the amount of spam entering the system at all.