Security

• 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. ...
  
• Web Filter
  webfilt is not a spam filter, but provides a generic web-based interface for Bayesian-style Unix filters that need occasional training and corrections. It has been tested with SpamProbe and SpamBayes...
  
• spamdeliver
  spamdeliver is a cyrus-imapd delivery agent that filters email messages thru SpamAssassin. If the message is marked as spam, it will be delivered into "INBOX/spam" mailbox, which can be later reviewe...
  
• Microbrew MicroSieve
  Microbrew MicroSieve is designed to be a high speed spam filter for USENET news. It checks for duplicate and large articles, spambots, and binaries in non-binary groups. ...
  
• IMAP Spam Begone
  IMAP Spam Begone is a script that scans an IMAP inbox for spam using SpamAssassin, moving any found to another folder. ...
  
• Smtpblock
  Smtpblock is a tool that parses your UNIX mail log. When new mail messages are detected, it performs DNSBL/SMTP relay tests. If the host is listed in a DNSBL or relays third-party mail, Smtpblock cre...
  
• CanIt
  A server-based spam control system. ...
  
• RIG (Random Identity Generator)
  RIG (Random Identity Generator) is a free replacement for a shareware program out there called 'fake'. It generates random, yet real-looking, personal data. It is useful if you need to feed a name to...
  
• antispam distiller
  SpamDistiller is a program which automatically filters all incoming email directly on your mail server so that you never have to download large quantities of spam and/or virus infected email. ...
  
• Aegis Virus Scanner
  Aegis Virus Scanner is a virus scanner with a simple and intuitive graphical user interface. It supports directory recursion, .zip and.tar archive scanning, quarantining, and drag-and-drop. ...
  
• BitDefender Linux Edition
  BitDefender Linux Edition is a powerful on-demand antivirus scanner for command lines and shell scripts. ...
  
• F-Prot Antivirus
  This is a Linux version of the popular icelandic F-Prot antivirus software. Works as usual scanner, not as resident antivirus shield. Detects and removes also viruses from Windows partitions. It is a...
  
• QtFprot
  QtFprot is a frontend for FPROT 4.x, a free (for personal use) Linux virus-scanner. It's similar to XFprot, but written in Qt. It allows you to set all FPROT paramters with a comfortable GUI. ...
  
• Clam Antivirus
  Clam AntiVirus is a GPL anti-virus toolkit for UNIX. The main purpose of this software is the integration with mail servers (attachment scanning). The package provides a flexible and scalable multi-t...