jleveille writes "Spam, it's become the thorn in everyone's side, flooding mailboxes from home users to choking mail servers at the corporate level. Spam accounts for nearly half of the traffic carried on the Internet and it is only going to get worst.
It can be fought with success using the right open source tools, a little elbow grease, and a little maintenance after its setup.
The tools we used are Debian GNU/Linux, Postfix, amavisd-new, spamassassin, and razor. We will also use Fetchmail to retrieve mail from our isp and pass it to postfix. The combination creates a strong e-mail gateway that will filter and strip spam from ever entering your, or your companies mailboxes."