Spamassasin - Intelligent Spam Filter

•    C

---

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

Spay - SPam BAYesian Filter Project

•    C

---

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

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

•    C

---

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

DSpam - Content based Spam Filter

•    C

---

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

Maildrop Spam Filter

•    

---

Adapted a procmail spam filter for use by maildrop (used by courier mail server). Any identified spam has a header added that marks it as spam and gives a reason. Also converts mime parts of content type text/html into text/plain in suspect e-mails.

SpamProbe - fast bayesian spam filter

•    C++

---

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

SMTP Guard Filter

•    

---

Spam filter for SMTP server. Check emails for spam against 9 different filters. Easy to customize and tune to your specific needs. Easy to create new filters. Eliminate 99% of spam.

smtp email-filtering filter spam spam-filter vs2010

Quick Spam Filter

•    C

---

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.

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

---

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

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

•    Javascript

---

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

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

•    C

---

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.

Spam Trainer

•    CSharp

---

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.

SMC Anti-Spam Filter

•    C

---

SMC milter - Anti-Spam E-mail Filter

SpamCheetah

•    C

---

SpamCheetah is an OpenBSD greylisting based spam filter. It is a liveCD that can run on any machine and it does not modify your hard disk or anything else. It is a network level spam filter and you have to run a separate mail server with it.

SpamAssassin for Win32

•    C

---

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.

SMTP Proxy Server as spam/virus filter

•    VB

---

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

openprotect email filter

•    

---

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

scmail

•    

---

scmail is a mail filter written in Scheme. scmail can filter an incoming mail when it is received and filter mails in a mailbox. A bayesian spam filter called scbayes is also included.

ASSP - Anti-Spam SMTP Proxy

•    Perl

---

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

amavisd-new - interface between mailer (MTA) and content checkers

•    Perl

---

amavisd-new is a high-performance interface between mailer (MTA) and content checkers amd virus scanners. It talks to MTA via (E)SMTP or LMTP or by using helper programs. It works best with Postfix, Sendmail and Exim v4, works with sendmail/milter, or with any MTA as a SMTP relay. The content received from the mail server is processed with Spam and Anti virus scanner and based on the results the mails will be quarantined.

content-filter interface mail-filter mail