Mailscanner

Powerful virus/spam scanning framework for mail gateways

MailScanner is a complete e-mail security system designed for use on e-mail gateways. It protects against viruses, and detects attacks against e-mail client packages such as Outlook, Outlook Express, Eudora. It can also detect almost all unsolicited commercial e-mail spam passing through it and respond to all incidents in a wide variety of ways.

Not only can it scan for known viruses, but it can also protect against unknown viruses hidden inside e-mail attachments by refusing entry to attachments whose filenames match any given pattern. This can include generic patterns that trap filenames attempting to hide the true filename extension e.g. “.txt.vbs”.

It is superior to many commercial packages in its ability to handle attacks against itself, such as Denial Of Service attacks caused by messages containing the “Zip of Death”. It is easy to install into an existing e-mail gateway, requiring very little knowledge of sendmail and no change to an existing sendmail configuration.

MailScanner itself is entirely open source, but it uses widely known commercial virus scanning packages at its core. The other software it uses is all high quality open source software, leading to a system that can be trusted for performance and reliability.