Introduction

Spam (unsolicited commercial e-mail) accounts for 35% of all messages and is rapidly increasing. 1 in 150 messages contains a virus, costing many billions of dollars around the world every year. Surveys have shown that removing 1 virus from 1 PC costs over $600. Removing a virus infection from a server costs over $50,000.

MailScanner is already a highly-respected open source e-mail security system, with more users than AOL and Hotmail combined, and this new release increases its stability and performance. It processes 500 million e-mail messages every day, removing 2 million viruses and identifying 75 million spam messages. MailScanner is used at 20,000 sites around the world protecting top government departments, commercial corporations and educational institutions. It is becoming a standard feature of many ISP's as virus protection and spam filtering are now essential requirements for most users.

MailScanner scans all e-mail for viruses, spam and attacks against security vulnerabilities. It is not tied to any particular virus scanner, but can be used with any combination of 14 different virus scanners, allowing sites to choose the "best of breed" virus scanner. Being open source, site administrators can audit and verify the integrity of the system. Its role is a major part in the security of a network, and so it must act as a trusted service. The only way to achieve the required level of trust is to be open source, an approach the commercial suppliers are not willing to take. MailScanner has been developed in a world-leading Electronics and Computer Science Department at the University of Southampton, and is distributed for *FREE* under the GNU Public Licence.

To find out more, visit the web site at www.mailscanner.info or contact the team directly at MailScanner@MailScanner.info.

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