MailScanner – email security system design

MailScanner is a freely distributable E-Mail gateway virus scanner and spam detector. It uses sendmail or Exim as its basis, and a choice of 17 commercial virus scanning engines to do the actual virus scanning.

It can decode and scan attachments intended solely for Microsoft Outlook users (MS-TNEF). If possible, it will disinfect infected documents and deliver them automatically. It also has features which protect it against Denial Of Service attacks.

MailScanner is highly configurable using a very easy-to-use system of rulesets. Virtually every configuration option can, for example, be controlled on a per-user, per-domain or per-IP basis.

MailScanner is extremely easy to integrate into your existing mail transport system, requiring no modification of existing sendmail configurations. Other MTAs require only minor modifications to configuration files, and these are all well documented both online and in the MailScanner book, available direct from the MailScanner web site.

Worldwide, the author estimates the software is processing over 1 billion e-mails every day, with over 1 million downloads.

Features include:

  • Supports all major servers including sendmail, postfix, qmail and others.
  • No rework of your mail system configuration required to use or remove MailScanner.
  • Protects the enterprise against virus, trojan and ‘phishing’ attacks from outside and inside the corporate network.
  • Manage using multiple whitelists, blacklists and customized rules.
  • Quarantine suspicious mail.
  • Content and attachment filtering – highly configurable.
  • Many spam detection techniques used including blacklists, heuristic rules, Bayesian statistics, SpamAssassin and global spam detectors such as DCC, Razor and Pyzor.
  • Protects against the most common known and future attacks exploiting vulnerabilities in users’ email applications.
  • Eliminates spam using a wide range of techniques, defeating attempts to circumvent individual spam detection systems.
  • Screens out pornography and other malware attacks.
  • Professional installation and support contracts available.
  • Used by US Navy, US Army, UCLA, Harvard, MIT, Siemens, HP and tens of thousands of other sites.
  • Highly scalable, one corporate site filters 11 million messages per day on one server, another has over 100 MailScanner servers operating as a cluster.

Website: www.mailscanner.info
Support: Manual
Developer: Julian Field
License: GNU GPL v2

MailScanner is written in Perl. Learn Perl with our recommended free books and free tutorials.

Return to Email Home Page | Return to Anti-Spam Tools Home Page


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