Postfix Add-on Software

To have information listed on this page, please send mail to wietse@porcupine.org. The information listed here is maintained by the respective authors. It is listed without formal evaluation, in other words, no implied warranty of any kind.

PGP/SMIME gateways | policy servers/libraries | open proxy/relay detection | before smtp auth | certified email | configuration/queue/user mgt | virus/spam content filters | fax<->mail | list managers | logfile analysis | lookup tables | pop/imap | webmail | package mgt | autoreply | quota | miniature clients | other

This page lists tools, add-ons and howtos by subject. Just to be clear on what I am talking about, here is a brief definition of the terminology that is used below:

• Utility, system - requires no change to Postfix source code.
• Patch - requires making changes to Postfix source code.
• Howto - examples of using add-on software with Postfix.

PGP/SMIME Gateways

• Z1 SecureMail Gateway Security server for email using S/MIME and PGP.

Policy servers/libraries

• smtpd-policy-template skeleton policy server in Perl by Michael Tokarev.
• gld greylist server with MySQL database by Salim Gasmi.
• SQLgrey: greylist policy server with auto-whitelisting in Perl with support for PostgreSQL, MySQL and SQLite storage by Lionel Bouton.
• gps greylist policy server in C++ using MySql, Postgres, or SQLite by Michael Moritz.
• Postgrey greylist policy server in Perl by David Schweikert.
• policyd policy server in C which provides greylisting, sender (envelope or SASL) based throttling (messages and/or volume per hour) and spamtraps by Cami Sardinha.
• policyd-weight weighted policy daemon by Robert Felber, to score DNSBLs, HELOs, FROMs, and Client IP Addresses, and reject mail before any queuing is done.
• tumgreyspf Greylisting and SPF policy server by Sean Reifschneider. This uses the file system (instead of a database file) for storing greylist data and configuration information.
• libspf library and patch.
• libspf2 patch by Dean Strik.

Note: Postfix already ships with SPF support, in the form of a plug-in policy daemon. This is the preferred integration model, at least until SPF is mandated by standards.

Open relay/proxy detection

• grinch utility by Daniel Mack. On request by Postfix, it finds out if a host is an open mail relay and caches the result.
• proxycheck open proxy detection utility by Michael Tokarev. Some additional scripting is required to integrate with Postfix.

Before SMTP authentication

• pop-before-smtp utility by Bennett Todd.
• whoson patch by Laurent Wacrenier.
• pop-before-smtp howto by Ralf Hildebrandt.
• DRAC howto by Ralf Hildebrandt.

Certified email

• OpenPec Certified email system by Ksolutions S.p.A. (Italian site).

Configuration/Queue/User management

• ViPMin web-based management tool designed for Postfix and Courier-IMAP email servers, for administrators and end users. Specific examples are given for MySQL and SpamAssassin.
• pfqueue Postfix queue management utility.
• Postfix enabler utility for Mac OS X. Sets up SMTP, POP3, IMAP, SSL support, SASL (client or server).
• Web-cyradm.org Web Based Management tool for Postfix, Cyrus IMAP, and MySQL or PostgreSQL by Luc de Louw.
• Postfix Admin a Web Based Management tool for Virtual Domains and Virtual Users that are stored in MySQL.
• webmin system has a Postfix configuration module.
• webmin system documentation.
• tequila ( backup link) system for Postfix configuration management, including mail forwarding and autoreply.
• postfixmanager user management tool for Postfix by Genco YILMAZ.
• BASH script for automatic completion of postconf commands by Carsten Hoeger.

• SUSE Openexchange Server.
• Trustix Mail Server.
• POSTCONF Mail Server.

Virus/SPAM content filters

• Xamime email content management system.
• Postfix+Amavis+ClamAV+Spamassassin howto by Tobias Rice.
• renattach rename or delete attachments by file name or file type, by Jem Berkes. Beware: prior to version 1.2.2 the "-p" or "--pipe" command-line option is not safe and may result in munged addresses.
• spampd spam filtering, transparent SMTP/LMTP proxy using SpamAssassin, in Perl by Maxim Paperno.
• amavisd-new utility, a high-performance interface between MTA and virus/SPAM scanners.
• Anti-spam gateway howto using OpenBSD, Postfix, amavisd-new, SpamAssassin, Razor and DCC.
• SpamAssassin mail labeling system.
• per-user SpamAssassin filtering by Mikko Pikarinen.
• amavisd-new/Razor/SpamAssassin setup tutorial by Scott Henderson.
• amavis system, works with Postfix and other MTAs.
• mailscanner system, works with Postfix and other MTAs. This uses unsupported methods to manipulate Postfix queue files, and there are multiple reports of message duplication and/or delivery of truncated messages.
• avcheck utility by Michael Tokarev. Interfaces to several virus scanning engines.
• sophie system, works with Postfix and other MTAs.
• maildrop howto by Matthias Andree. The maildrop delivery agent is part of the Courier mail server software.
• anomy email sanitizer system.
• anomy howto by Derrick Webber.
• avpcheck howto by Ralf Hildebrandt.
• smtpprox generic SMTP filtering proxy by Bennett Todd.
• Vexira Antivirus for Mail server AntiVirus, AntiSpam, and more. Supports Linux, FreeBSD, OpenBSD, Solaris, AIX.
• procmail howto for sanitizing email by John D. Hardin.
• crm114 mail content inspection system.
• crm114 Postfix howto by Eugene Borukhovich.
• Tagged Message Delivery Agent (TMDA) by Jason R. Mastaler, a system that requires unknown senders to send confirmation before they are put on a whitelist.
• html-trap utility by Samuel Seay for procmail-based content filtering.

• Postfix Anti-UCE Cheat-Sheet by Jim Seymour.
• UCE and other howtos by Ralf Hildebrandt.
• ORDB (open relay database) configuration tips.
• Per-user UCE controls patch by Jozsef Kadlecsik.
• RBL+ howto by Furio Ercolessi; uses Jozsef Kadlecsik's patch.
• RBL analysis tools by Craig Sanders.
• concierge utility by Rich Graves. Analyses Postfix logs and sends mail to users whose mail was rejected by Postfix content filtering.

Fax<->Email software

• FaxmimumFax Messaging Server (FMS) integrates with Postfix and other MTAs and provides email-to-fax and fax-to-email gateways.

List managers

• Ecartis mailing list manager system (formerly: Listar).
• Listar howto by Craig Sanders.
• Mailman howto by Dax Kelson.
• Mailman, the GNU Mailing List Management System.
• majordomo howto by Jon Parise.
• SmartList Mailing List Management System howto.

Logfile analysis

• pflogsumm logfile analyzer utility by Jim Seymour.
• AWStats logfile analyzer system.
• Anteater logfile analysis system by Tobias Erbsland.
• mailgraph, an RRDtool frontend utility by David Schweikert.
• mailstats logfile analyzer utility by Craig Sanders.
• LogReport logfile analyzer system. On-line log report processing is available at log@postfix.logreport.org.
• Logrep logfile analyzer system.
• Isoqlog logfile analyzer system (also supports qmail and Sendmail).

Lookup tables

• pam lookup table by Andrew I Baznikin; for example, use this to implement local_recipient_maps with RADIUS.
• cidr2abc utility by Gjermund Sorseth to convert arbitary net/mask patterns into octet based patterns such as used in Postfix access maps.
• NIS+ patch by Geoff Gibbs.
• cdb patch by Michael Tokarev.
• tinycdb Michael Tokarev's own CDB implementation.
• Mysql howto by Daniel V. Pedersen. Uses the Postfix virtual(8) delivery agent.

POP/IMAP servers

For howto documents, see Howtos and FAQs.

• Dovecot system implements IMAP and POP, and supports TLS.
• perdition system is a smart POP/IMAP proxy that connects users to the "right" POP/IMAP server.
• Cyrus IMAP system implements IMAP, POP3, and KPOP, later versions also support TLS. This software implements its own private mail database system. Not for beginners.
• vmail admin a set of PHP and PERL scripts for administering virtual domains on a pop toaster that uses Postfix, Postfix virtual or Courier IMAP, and MYSQL.
• Courier-Imap system provides POP3 and IMAP, and supports access over SSL. This software supports the maildir-style mailbox format only (one message per file, same format as qmail).
• Qpopper system supports POP3, TLS (SSL), and uses the traditional UNIX-style mailbox format (multiple messages per file, each message starts with "From sender date...").

Webmail

• phpGroupWare multi-user groupware suite written in PHP.
• Squirrelmail PHP4 based system.
• OpenWebmail system.
• @Mail system (also for wireless telephone).
• IMP system.
• NeoMail system.
• CAMAS system, an IMHO variant.
• IMHO system.

Package management

• Solaris utility to create Postfix installable packages.

Autoreply software

• yaa! (yet another autoresponder) autoreply utility by Branko Grac. This can run as a one-time command at the end of a pipe, or as a resident server.
• Autoreply system architecture by Joshua E. Warchol. You still need to provide the PERL script that does the actual responding.
• gnarwl autoreply utility by Patrick Ahlbrecht. This uses LDAP instead of .forward+vacation.

Quota software

• Per-user mailbox quota patch by Keith Stevenson. Not part of Postfix because it does not work with maildir files and because users with .forward files can bypass quota restrictions.
• PostmMon Postfix Mail Box Monitor by Eduardo Mendes and Ricardo Malafaia. This sends mail notifications when a user has too much mail.
• Postfix virtual delivery agent patches with additional features including quota by Anderson Nadal.

Miniature client software

• mini_sendmail utility by Jef Poskanzer, a minimal program to submit mail over SMTP, for example, from a chrooted WWW server.
• nbSMTP (no-brainer SMTP) utility by Fernando Jose Pereda Garcimartin.

Other software

• configurable SMTP server error replies by Corcalciuc V. Horia
• Multi-line SMTP banners patch by Simon J Mudd. Grumble.
• Patches by Michael Tokarev.
• Patches by Cygnus: mail spool hashing, mailbox size limit, maildir size limit.