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Anti-Spam SMTP Proxy Server

188 Recommendations
302,184 Downloads (This Week)
Download ASSP_2.2.1_12137_install.zip
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Description

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 12137.

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.

Anti-Spam SMTP Proxy Server Web Site

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

User Ratings

 
 
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User Reviews

  • Posted by Rae Melugin 7 days ago

    Best open source, easy to implement anti-spam filtering software. Awesome project!

  • Posted by Miguel Diego 2012-03-30

    Seriously awesome spam protection! Easy to install and get up and running. There are so many options that it takes a bit of digging around to get the hang of what needs to be adjusted, but it's well worth the effort.

  • Posted by Alex DD 2012-03-24

    ASSP default settings are working well but the configuration can be difficult .But it's well worth...thanks

  • Posted by Starker 2011-02-21

    Nice but a bit complected

  • Posted by Steve 2009-08-15

    Powerful, effective software. Lots of parameters to configure but the default settings are very sane. End users like being able to forward their own spam to the system and I don't have to deal with it!

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