Open Source Perl Email Spam Filter Software

The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261. A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are also available for download. NOTICE: V1 development has been stopped at the end of 2014 (1.10.1 build 16060). Possibly there will be done some bugfixing in future. Please upgrade to V2, which is and will be actively maintained.

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, Webmail, calendaring, and mailing list services.

Open source DKIM library, MTA filter implementation and associated tools.

The bogofilter package implements a fast Bayesian spam filter as suggested by Paul Graham in "A Plan For Spam" <http://www.paulgraham.com/spam.html>. It is written in C. Supported platforms: Linux, FreeBSD, Solaris, OS X, HP-UX, AIX, RISC-OS, ...

Postfix greylisting policy service with auto-white-listing written in Perl with SQL database as storage backend. Greylisting stops 50 to 90 % junk mails (spam and virus) before they reach your Postfix server (saves BW, user time and CPU time).

Vipul's Razor is a distributed, collaborative, spam detection and filtering network. The primary focus of the system is to identify and disable an email spam before its injection and processing is complete.

DKIMproxy is an SMTP-proxy that implements the DKIM and DomainKeys standards, to sign and verify email messages using digital signatures and DNS records. It can be used to add DKIM support to nearly any existing SMTP mail server.

POPFile is an email classification tool with a Naive Bayes classifier, POP3, SMTP, NNTP proxies and IMAP filter and a web interface. It runs on most platforms and with most email clients.

SpamAssassin for Win32 is a free and powerful anti-spam filter for Windows. Includes a resident daemon for mail servers and a user-friendly personal spam filter that works with any POP3 account and any email client.

MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project https://github.com/SpamTagger [antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready. MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet. It includes a complete GNU/Linux OS and a graphical web interface for user and administrative access. It comes in the form of virtual machine templates.. - fully compatible with any SMTP mail server (Exchange, Zimbra, O365,...)

AMaViS is a script that interfaces a mail transport agent (MTA) with virus scanners.

An open, all-in-one SMTP gateway, scanning your email traffic in order to prevent spam and viruses, using several anti-spam technologies. Based on Ubuntu Server.

A Perl script that you slip between your MTA (e.g. Sendmail) and your local mailer to remove executable (.EXE, .COM, .VBS, etc.) MIME attachments from email messages.

This is an open source implementation of the draft DMARC specification.

Qmail-Scanner, is a Email content scanner that enables a Qmail Email server to scan all Email it receives for certain characteristics (normally viruses), and react accordingly.

SpamIntelligence brings SpamAssassin 3 and Clam AntiVirus to Outlook

A.I. security app. Development ceased.

Abbruch is a commandline utility to ease the generation of banned/allowed/special actions to be applied to a list of users sending you email, by generating a .procmailrc file. requires: perl5, procmail

actively combat spam through realtime activity monitoring

Archer-Milter , A Sendmail spam filtering solution for system administrators.

Ardok Mail reader (ARM) is a mail checker written in perl/tk. The main goal of the programm is to manage the mails sent on a pop3 server. But it can also be used to write and read mails (on the server or on the hard drive).

Autofiler is an automatic serverside mail filer application based on Bayesian text classification. In combination with an IMAP server, autofiler can file messages in folders automatically and transparently.

An e-mail filing system that will automatically sort an incoming e-mail message to the appropriate folder by learning the user's mail folders contents. Will also include an option to correct errors in filing.

A simple Milter which checks the senders and recipients email address are valid (i.e. a MX server will accept mail for it). Written in PERL using the Sendmail::Milter interface, this caching milter signifcantly reduces the ammount of UCE/UBE.

BSpam is a perl implementation of Paul Graham's Bayesian Spam filtering system: A Plan For Spam.