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).

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.

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,...)

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.

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.

mailscanner-mrtg provides configuration files, web pages and related perl scripts for mrtg to monitor your MailScanner (http://www.mailscanner.info/) machine.

iXhash is a plugin for the popular spam filter SpamAssassin. It computes MD5 checksums of fragments of the body of an e-mail and compares them to those of know spam using DNS queries to a RBL-like name server. In effect this gives SpamAssassin access

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.

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.

pgpenvelope is an interface between Pine and the GNU Privacy Guard (GnuPG). It allows one to perform expected OpenPGP-related operations on messages. Ease of installation, setup, and use are distinguishing features.

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.

An anti spam system that predates built-in options in Exim, since Exim now has it's own options you should not consider using this code.

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

IMAPAssassin is a SpamAssassin enabled IMAP client that allows a user to filter any IMAP mailbox for spam from any computer connected to the Internet. You needn't have any access to the IMAP server and you don't need to run a mail server to filter mail

SpamIntelligence brings SpamAssassin 3 and Clam AntiVirus to Outlook

SPAMSNAIL is a anti-spam filter dedicated to end-users with a slow / non permanent connection to their mail server. It is written in Perl and uses the Bayes system.

whatsnewfm is a filter for the daily freshmeat newsletter. It shows only news items that you have not seen before. You can also set up a list of "interesting" applications where you want to be informed of every update.

The OpenPEC project is a collaborative effort to develop an Open Source Certified E-Mail System (in italian: Posta Elettronica Certificata or PEC) as requided by the Italian law. See the DigitPA (CNIPA) site for details (http://www.cnipa.gov.it)

A.I. security app. Development ceased.