antispam

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• ASK - Active Spam Killer
  This program (Active Spam Killer, or ASK for short) takes an "Active" approach in solving the problem: Everytime an email is received, a message is sent back to the sender asking for confirmation. If...
  
• rblcheck
  rblcheck is a lightweight C program for doing checks against Paul Vixie's MAPS Blackhole List and the ORBS open relay list. It works well in conjunction with Procmail for filtering unwanted bulk emai...
  
• bogofilter
  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 classifi...
  
• BlackMail
  BlackMail is an Anti-Spam mailer proxy for use with popular MTA's like Sendmail, QMail, and SMail. It is highly configurable, very powerful, very fast, and runs on a large variety of platforms. It ha...
  
• SpamAssassin
  SpamAssassin is a mail filter that uses a wide range of heuristic tests on mail headers and body text to identify spam. Once identified, the mail can then be optionally tagged as spam for later filte...
  
• qmail-smtpd-auth
  qmail-smtpd-auth is a patch for qmail that enables it to support SMTP AUTH protocol with the following auth types: LOGIN, PLAIN and CRAM-MD5. It's based on a previous patch by Mr.Brisby that implemen...
  
• junkfilter
  junkfilter is a procmail-based spam filtering system that is both configurable and customizable. ...
  
• GNU sauce
  Anti-spam server ...
  
• blq
  blq is a Perl script that queries one or more lists, such as the MAPS RBL or MAPS DUL, to determine if a host is listed as a potential source of spam or email abuse. ...
  
• MIMEDefang
  MIMEDefang is a program for inspecting and modifying e-mail messages as they pass through your mail relay. ...
  
• clamfilter
  Clamfilter is a small, secure, and very efficient content filter for Postfix designed for filtering messages efficiently through the clamd daemon. ...
  
• SpamBouncer
  The SpamBouncer is a set of procmail recipes, or instructions, which search the headers and text of your incoming email to see if it meets one or more of the predefined conditions. The SpamBouncer so...
  
• spamresponder
  Spamresponder is a very simple and radical spam filter. ...
  
• Ricochet
  A lot of unsolicited email goes unreported because tracing the origins of a possibly forged mail and finding the right people to report to, is complicated and time-consuming. Ricochet, a smart net ag...
  
• DSPAM
  DSPAM is a server-side statistical anti-spam agent for Unix email servers. It masquerades as the email server's local delivery agent and effectively filters spam using a combination of de-obfuscation...
  
• smtpfilter
  smtpfilter is a filter for an SMTP session which passes the session through transparently in real time, except for the DATA command which is intercepted in order to scan the data for spam and/or viru...
  
• spamstats
  Spamstats is a Perl script that analyses spamassassin+mailer logs in order to extract useful informations about spam traffic. ...
  
• pop3spam
  pop3spam is a POP3 client which connects to a POP3 server and deletes unsolicited mail. If a message has been identified as unsolicited, it can be deleted directly from the POP3 server without the ne...
  
• spamhammerd
  Spamhammerd is a dynamic blacklist daemon for Postfix. It watches for clients generating excessive errors, and adds them to the blacklist after a configurable threshold. It is extremely effective on ...
  
• Sendmail Confirmation System
  Sendmail Confirmation System (SMC) is an Sendmail milter plugin that is designed to significantly reduce the amount of junk email you receive. It uses dynamic local and DNS-based remote whitelists, b...
  
• Yosi's Anti-Spam POP3 fIlter bot
  yaspi (Yosi's Anti-Spam POP3 fIlter bot) is a POP3 mail-scanner specifically made to combat mail bombings caused by viruses (i.e. Swen). It connects to the POP3 server, inspects the messages, and del...
  
• PASP
  PASP is a Bayesian-like spam filter that can be used as a POP3 proxy. ...
  
• parp
  parp is a powerful, extensible e-mail filter with sophisticated anti-spam capabilities. It's designed as a complete replacement for procmail, is MIME-aware, and acts as a filter, daemon, or on mailbo...
  
• RBL Spam Daemon
  rblsd is a small, fast, SpamAssassin-compatible spam filter. It filters messages by performing a series of RBL lookups on the path of the message. ...
  
• SpamFirewall
  SpamFirewall is a mail server filter script that automatically blocks mail servers that send too much spam. ...
  

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