Zen Software LtdWeb: http://www.zensoftware.co.uk Email: sales@zensoftware.co.uk Tel: 0845 058 9058 TUTORIAL – CONFIGURING MDAEMON TO DEAL WITH SPAM Overview Since v6.8, MDaemon Pro has come with powerful spam filtering technology built into it. In its default state following installation, MDaemon will score the content of all messages using sophisticated pattern matching techniques. It will then ‘flag’ messages that have gone above a specified score threshold and could therefore potentially be spam - users will see the subject line pre-pended with ‘***SPAM*** Score/Req: 07.10/05.00 - …’. Unless a small amount of further configuration is made, MDaemon itself will still deliver the flagged messages to end users. This document describes a suitable way to configure MDaemon to automatically filter potential spam away from end users to allow final checking prior to deletion by an administrator. In its default state, users can expect an accuracy of about 70 – 80% with a virtually negligible false positive rate i.e. the number of genuine messages incorrectly flagged as potential spam. This document also describes how to manage MDaemon’s Bayesian spam filtering features to increase the level of accuracy to +95% whilst still maintaining a virtually negligible rate of false positives. A quick overview of IMAP IMAP is an alternative collection method to POP3 that most popular email clients such as Outlook and Outlook Express support. While a ...