Anti-Spam SMTP Proxy Server

Description

Anti-Spam SMTP Proxy Server, commonly known as ASSP, is software designed to provide an efficient solution for spam protection in email servers.

It is compatible with various operating systems, including Windows and Linux, and can be easily integrated into existing email servers. It also runs on Unix, OS X and OS/2. It uses your existing SMTP server and works with Sendmail, qmail, Postfix, Exchange, Courier, Mercury, IBM Lotus Domino and other standard SMTP servers. It can forward a copy of every rejected or accepted mail to an address.

ASSP is an anti-spam SMTP proxy developed by Thomas Eckardt. It is free, open source software released under the GPL license. The source code is included for anyone who wants to customize an installation.

Anti-Spam SMTP Proxy Server Features

• Set up in a web browser, with no separate web server needed
• Bayesian and Hidden Markov Model (machine learning) filter that sorts email into spam and non-spam
• Automatic whitelist, so people you email are not blocked
• Optional blocking of executable attachments, including scripts and MS-Office macros, from non-whitelisted addresses
• Supports SPF, SRS, DKIM, DMARC, ARC, DNSBL and other checks
• Integrates with ClamAV, VirusTotal or any antivirus application of your choice
• Plugins for content-based executable detection, OCR, DCC, Razor2 and a blocked mail RSS feed
• Detailed analysis of the spam rating for specific messages