ASSP - The Anti-Spam SMTP Proxy (ASSP) Server

The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, Bayesian, Greylisting and multiple filter methods. Click 'Browse all files' to download the professional version 2.2.1 build 12176.

ALL V2 versions with a build number less than 12130 have a bug which make SSL/TLS unavailable if the Perl module IO::Socket::SSL 1.70 is installed. Don't upgrade the module to version 1.70 or upgrade to the latest assp version.

Features
Multiple Weighted DNSBLs
Multiple Weighted URIBLs
Greylisting
Weighted Regular Expression Filtering
Bayesian
Penalty Box
SenderBase
SSL/TLS
SPF/SRS
Attachment Blocking
ClamAV and FileScan
Blocking Reporting
LDAP support
Backscatter Detection
V2 - recipient replacement / GUI user access rights management
V2 - MIME charset conversion / DKIM check and signing
V2 - DB support for all hashes / level based open plugin support
V2 - transparent proxy support / BATV check and signing
V2 - Plugins: archive, full attachment check and replacement, OCR
V2 - damping (steal spammers time)
V2 - AUTH to relay host / POP3 collector
V2 - configuration value and file synchronization
V2 - Block Reports design could be customized
V2 - Razor2 and DCC support via Plugin
V2 - SNMP support (monitoring, configuring, controll-API)
V2 - user group import (file or LDAP or command based)
V2 - automatic crash analyzer Hidden Markov Model
V2 - IPv6 socket support
V2 - word stemming (several languages) for Bayesian analyzer
V2 - Perl module autoupdate via PPM or CPAN
V2 - Hidden Markov Model spam detection engine
V2 - full unicode support

ASSP 1.9.3.7!
ASSP 1.9.3.7 is ready for download from the Sourceforge site! This release is again packed with new features and enhancements.
Auto Update
Control Outgoing
Unique Backscatter Detection and Blocking
Foreign Character Support for Regex Filter
Native SSL-support. ASSP will be "Man in the Middle" and will do TLS/SSL-connections even if your MTA don't support it!
Resending of blocked eMail to the original recipients by clicking a link from the new eMail Block reports or from the maillog tail
Improved HELO handling
Classes of DNSBL lists
Weighting of Regular Expression
Improved community Griplist (GreyIP List)
Improved performance and memory usage
Additional to ClamAV you can now use your filesystem virusscanner for scanning your eMails
Lots of more usefull tweaks and setting

Download ASSP_2.2.1_12176_install.zip (1.3 MB)
Download other version - http://sourceforge.net/projects/assp/files/

Visit Website -
http://tinyurl.com/assp-home
http://sourceforge.net/projects/assp/
Screenshot -