Haraka is a lightweight SMTP server focused on performance, simplicity and modularity. The Haraka mail server uses plugins built from Javascript to facilitate speed and modularity. The concept of plugins (modules) allows an administrator to implement only those plugins which are needed.

Apache SpamAssassin is an extensible email filter that is used to identify spam. Once identified, the mail can then be optionally tagged as spam for later filtering. It provides a command line tool to perform filtering, a client-server system to filter large volumes of mail, and Mail::SpamAssassin, a set of Perl modules allowing Apache SpamAssassin to be used in a wide variety of email systems.

This tutorial describes how to scan emails for image spam with FuzzyOCR on a Fedora 12 server. FuzzyOCR is a plugin for SpamAssassin which is aimed at unsolicited bulk mail containing images as the main content carrier. Using different methods, it analyzes the content and properties of images to distinguish between normal mails (ham) and spam mails.

This tutorial describes how to scan emails for image spam with FuzzyOCR on a Debian Lenny server. FuzzyOCR is a plugin for SpamAssassin which is aimed at unsolicited bulk mail containing images as the main content carrier. Using different methods, it analyzes the content and properties of images to distinguish between normal mails (ham) and spam mails.

Mail administrators which use spamassassin and its Bayesian filter need to train the classifier on a regular basis. Spamassassin's sa-learn utility needs to process full RFC-822 emails including mail headers and the the mail body. The following howto describes a method of how full emails can be extracted from the mailsystem Zarafa.

This tutorial describes how to scan emails for image spam with FuzzyOCR on an Ubuntu 9.10 server. FuzzyOCR is a plugin for SpamAssassin which is aimed at unsolicited bulk mail containing images as the main content carrier. Using different methods, it analyzes the content and properties of images to distinguish between normal mails (ham) and spam mails.

Once you have set up Spamassassin so it is working and you have run it for some time you may want to tune it to provide automatic whitelists and blacklists. The whitelist will provide a way to insure that the mail from a particular source will never get rejected.

The biggest advantage if Citadel is ease of installation and ease of configuration. Both of these can be a serious hassle when you are building a Postfix mail server from scratch. So the focus of this documentation is clear easy configuration. The goal also requires a mail server that has an easy interface to make changes with and that is intuitive.

SpamAssassin will use tests to check mail headers, the body, IP Addresses and checksums to locate patterns that indicate SPAM. So SpamAssassin will use pattern-based scores for checking patters that are found in headers, the body or attachments and it will use network-based tests that use DNS lookups or access RBL lists.