DSpam - Content based Spam Filter

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DSPAM is a scalable and open-source content-based spam filter designed for multi-user enterprise systems. DSPAM is an adaptive filter which means it is capable of learning and adapting to each user's email. Instead of working off of a list of rules to identify spam. DSPAM's probabilistic engine examines the content of each message and learns what type of content the user deems as spam or nonspam.

spam email-spam-filtering spam-filtering content-filtering

Spamassasin - Intelligent Spam Filter

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SpamAssassin is a mature, widely-deployed open source project that serves as a mail filter to identify Spam. SpamAssassin uses a variety of mechanisms including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. SpamAssassin runs on a server, and filters spam before it reaches your mailbox.

spam email-spam-filtering spam-filtering content-filtering

Spam Scanner - Best anti-spam, email filtering, and phishing prevention service

•    Javascript

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Spam Scanner is a drop-in replacement and the best alternative to SpamAssassin, rspamd, SpamTitan, and more. Spam Scanner includes modern, essential, and performant features that to help reduce spam, phishing, and executable attacks.

spamassassin anti-spam spam-prevention spam-protection rspamd spam-filtering spam-classifier spam-detection enron spam-classification spam-filter rspam

openprotect email filter

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OpenProtect is an anti spam server providing spam filter and virus blocker as an email smtp gateway. Please head to http://www.openprotect.com for more information. You can get a free download at http://www.openprotect.com/anti-spam-download

ASSP - Anti-Spam SMTP Proxy

•    Perl

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ASSP is a SMTP proxy which sits between SMTP server and the MTA. It filers the spam and delivers the legtimate mails to the MTA. Its feature include Bayesian analysis, Sender Policy Framework) validation and blocking, Realtime Blackhole Listing, URL Black Listing, Multi-level attachment blocking, LDAP support, Backscatter Detection, SNMP support and lot more.

spam email-spam-filtering spam-filtering content-filtering

QSpamDog spam filter

•    PHP

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QSpamDog is a PHP-based email filter which is intended to be used primarily in filtering spam email. It was designed for usage with QMail based email-servers which use the Maildir format for storing users' emails.

nginx-ultimate-bad-bot-blocker - Nginx Block Bad Bots, Spam Referrer Blocker, Vulnerability Scanners, User-Agents, Malware, Adware, Ransomware, Malicious Sites, with anti-DDOS, Wordpress Theme Detector Blocking and Fail2Ban Jail for Repeat Offenders

•    Shell

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Please make sure you are subscribed to Github Notifications to be notified when the blocker is updated or when any important or mission critical (potentially breaking) changes may take place. This is our new preferred method of installation which is now done through a set of shell scripts contributed to this repo and maintained by Stuart Cardall @itoffshore who is one of the Alpine Linux package maintainers.

nginx nginx-server bot-blocker bots spam-blocker spambot-security spam-protection spam-filtering spam-prevention spam-referers porn-filter gambling-filter scanners vulnerability-scanners referer-blocker referrer-spam spyware adware malware spam-referrer-blocker

Quick Spam Filter

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Quick Spam Filter is a small, fast spam filter that works by learning to recognise the words that are more likely to appear in spam than non-spam. It is intended to be used in a procmail recipe to mark email as being possible spam.

Spay - SPam BAYesian Filter Project

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This project applies statistical text categorization techniques to the domain of spam mail filtering. The goal is to produce mail filtering software that can be trained to recognize spam in a particular individual's email. The statistical models produc

Spam Trainer

•    CSharp

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Not all email clients have Spam filtering (and training) built in. Spam Trainer provides easy (drag and drop) training from your mail client, passing messages through to your spam filter (e.g. Spambayes) via command line scripts.

NAGS PERL Spam Filter

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The NAGS Spam Filter is a PERL script which can be used to assist in the filtering of incoming email.

bogofilter -- Fast Bayesian Spam Filter

•    Perl

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Bogofilter is a mail filter that classifies mail as spam or ham (non-spam) by a statistical analysis of the message's header and content (body). The program is able to learn from the user's classifications and corrections. Bogofilter provides processing for plain text and HTML. It supports multi-part MIME messages with decoding of base64, quoted-printable, and uuencoded text and ignores attachments, such as images.

mail-filter spam-analysis spam statistical-analysis spam-filter

Scrollout F1 - An easy-to-use anti-spam email gateway

•    C++

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Scrollout F1 is an easy to use, already adjusted email firewall (gateway) offering free anti-spam and anti-virus protection aiming to secure existing email servers, old or new, such as Microsoft Exchange, Lotus Domino, Postfix, Exim, Sendmail, Qmail and others.

anti-spam email-spam-filtering spam-filtering spam anti-viris

SMTP Proxy Server as spam/virus filter

•    VB

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A proxy smtp server with 1. Use of user-selectable DNSRBL lists to reject mail with customised rejection messages 2. Spam trap addresses to identify dictionary attacks and other spam sources 3. White listing and blacklisting by IP addresses and domain

Rspamd - Fast, free and open-source spam filtering system

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Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules including regular expressions, statistical analysis and custom services such as URL black lists. It supports Regular expressions filtering, SPF, DKIM, DNS black list, URL black lists, Fuzzy hashes etc.

spam-filtering spam-analysis email-spam-filtering spf dkim

Deep Six

•    Perl

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Deep Six is a client side spam filtering tool that monitors your inbox for new email and filters it. The modular filter plugin-system allows for greater spam detection. Currently supports SpamBouncer, Vipul's Razor and DCC.

SpamProbe - fast bayesian spam filter

•    C++

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Fast, intelligent, automatic spam detector using Paul Graham style Bayesian analysis of word counts in spam and non-spam emails. Filtering adapts to personal tastes automatically. No manual rule creation required. Intended for use with procmail, maild

php-ext-trie-filter - php extension for spam word filter based on Double-Array Trie tree, it can detect if a spam word exists in a text message

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php extension for spam word filter based on Double-Array Trie tree, it can detect if a spam word exists in a text message. PHP 5.2 or later.

Mail-in-a-Box - One click easy-to-deploy SMTP server

•    Python

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Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box. Mail-in-a-Box lets you become your own mail service provider in a few easy steps. It’s sort of like making your own gmail, but one you control from top to bottom. Technically, Mail-in-a-Box turns a fresh cloud computer into a working mail server. But you don’t need to be a technology expert to set it up.

smtp email mail server smtp-server mail-server spf dkim dmarc spam-filtering email-server

SpamAssassin for Win32

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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.