Trust SpamAssassin Headers v0.5

Introduction

This is a filter for Spamihilator. Its purpose is to read the X-Spam-Status header set by Spamassassin. It uses the values found there to determine whether the email is spam or not. This is useful when your mail server or ISP is running SpamAssassin.

Installation

This filter is provided with an installer, which will place Trust SpamAssassin Headers.dll in your Spamihilator plugins folder, and supporting files such as the uninstaller, and this readme file in a Trust SpamAssassin Headers subfolder of the plugins folder.

It will also install the .net framework, if not already installed, and place the C++ runtimes in a Microsoft.VC80.CRT subfolder of the Spamihilator plugins folder. These are shared components which may be used by other plugins, so will not be removed on uninstallation.

If Spamihilator is running while installation is taking place, it will have to be restarted before the plugin can be used.

I would recommend positioning this filter high in the priorities list, as if Spamassassin is well configured then it should result in accurate determination of spam and non-spam messages, and when unable to make an accurate determination it does leave the spam status as Unknown.

Usage

This plugin requires no configuration. It reads the X-Spam-Status header, looking at the score and the required score:

• If the score is negative, then it has been whitelisted in some way by SpamAssassin, so is reported as Not Spam.
• If the score is greater than the required score, then SpamAssassin is confident that it is spam, so it is reported as Spam, with probability of 100%.
• If the score is between 0 and the required score, then it is reported as Unsure, and the probability set to be score / required score. I don't know whether this probability is used for anything, but if it were possible for Spamihilator to make a decision based on the probabilities reported by more than one filter, this could be useful.

Uninstallation

This filter can be uninstalled through the control panel "Add/Remove Programs" applet, or by running the uninstaller found in the plugins\Trust SpamAssassin Headers folder.

It is recommended to exit Spamihilator before uninstallation.

Changelog

v0.5

• Updated to Plugin SDK 2.6.1 for compatibility with Spamihilator 0.9.9.58 x64

v0.4

• Updated to be compatible with 64 bit Spamihilator, and to use new plugin installer.

v0.3

• Added support for headers added by cPanel/Exim with SpamAssassin enabled.

v0.2.1

• Fixed crash bug with old versions of Spamihilator.

v0.2

• Compatibility with Spamihilator version 0.9.9.25.

v0.1

• Initial relase.