SpamAssassin

Getting spam mail is nothing new, and even though this undesirable trait of online correspondence is mostly handled by your mail service's anti-spam protections, some unwanted messages may nevertheless still get through. This can be worrisome especially for businesses, so employing a solution like SpamAssassin can prove to be quite effective: it is a cmd-based tool, which uses a suite of mechanisms to detect and block spam mail.

The way the tool works is simple to understand: it uses several mechanisms, such as text analysis and Bayesian filtering to spot spam mail and block the respective senders. The tool also checks for the DNS requests of the spam mail.

Considering the form it comes in, the tool can be integrated into many types of email systems, and it is overall very versatile. Users can manage filters anytime by configuring the sa-update executable, as well as manage the performance of the Bayes Filter via the sa-learn.exe file.

A variety of plugins is supported, serving to further enhance spam protection. Solutions like Hashcash, Freemail, DKIM, among others, can be integrated, therefore boosting the efficiency of the spam protection algorithms.