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.

authentication | webmail | PGP/SMIME gateways | policy servers/libraries | open proxy/relay detection

before smtp auth | certified email | run/configuration/queue/user mgt | virus/spam content filters

disclaimers | fax<->mail | list managers | logfile analysis | lookup tables | pop/imap | 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.

Authentication

OpenDKIM MILTER plugin for Domain Keys Identified Mail.
dkfilter mail signing filter by Jason Long (code and instructions).
dkim-milter domainkeys identified mail signer/verifier. This uses the Postfix 2.3 plug-interface for Sendmail mail filters. See also the Postfix MILTER_README documentation.
dk-milter domainkeys signer/verifier. This uses the Postfix 2.3 plug-interface for Sendmail mail filters. See also the Postfix MILTER_README documentation.
sid-milter Sender-ID verifier. This uses the Postfix 2.3 plug-interface for Sendmail mail filters. See also the Postfix MILTER_README documentation.

Webmail

vPostmaster mail server with policy filters, POP3, IMAP, webmail, greylisting. Free for non-commercial use.
Roundcube browser-based mail client with a desktop-like user interface.
Zimbra Collaboration Suite with email, contact management and group calendaring.
phpGroupWare multi-user groupware suite written in PHP.
Squirrelmail PHP4 based system.
OpenWebmail system.
Atmail Webmail POP3/IMAP Webmail client which includes an Ajax interface and multiple Webmail templates.
IMP system.
NeoMail system.
CAMAS system, an IMHO variant.
IMHO system.

Virtual office ContactOffice.
Novell Open Enterprise Server (formerly: SUSE Openexchange Server).
Trustix Mail Server.

PGP/SMIME Gateways

DjigZo Open source email encryption gateway.
Z1 SecureMail Gateway Security server for email using S/MIME and PGP.

Policy servers/libraries

pfxpold policy daemon with plug-in policy support by Martin Schmitt.
Postgrey greylist policy server in Perl by David Schweikert.
Sqlgrey an sql-based fork of the postgrey daemon.
Gross greylist server by Eino Tuominen and Antti Siira.
policyd policy server in C which provides greylisting, sender (envelope, SASL or host/ip) based throttling (messages and/or volume per hour) and spamtraps by Cami Sardinha.
postfwd policy server, written in Perl, combines complex Postfix restrictions in a ruleset similar to those of the most firewalls.
apolicy or "ACL Policy Daemon" in Python by Miguel Filho.
ppolicy policy server in Python, by Petr Vokac.
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.
Greyfix greylist policy server in C with Berkeley DB database by Kim Minh Kaplan.
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 Nigel Kukard.
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 EXEntrica S.r.l..

Run/Configuration/Queue/User management

ViMbAdmin Virtual Mailbox Administration web application by Open Solutions, Ireland.
Korreio is a graphical toolkit to electronic mail systems management. It has several independent modules: Postfix Queue Manager, LDAP management, Cyrus-IMAP Mailbox management and Cyrus-Sieve management.
KyaPanel server manager from Anahuac.
Captain Mail from Yukthi Systems Pvt. Ltd.
Phamm Web Based Management tool for Virtual Domains and Virtual Users that are stored in LDAP.
POSTCONF Mail Server.
Running Postfix with Solaris 10 SMF by Geoff Gibbs.
RavenCore Hosting Control panel web-based control panel uses dovecot for POP3/IMAP, and configures multi-user / multi-domain email addresses with SMTP authentication via SASL. Also has the option for spamassassin and clamav for mail scanning.
vMail.Admin 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 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.

Virus/SPAM content filters

amavisd-new utility, a high-performance interface between MTA and virus/SPAM scanners.
Dr.Web anti-virus & anti-spam for Telecoms and businesses with heavy mail traffic; available as solution and SDK.
MPP for Postfix antivirus, antispam, archival, access control, content filtering, thresholds, auto-black lists, spam traps, and more.
SpamAssassin mail labeling system.
Automagically whitelist recipients from postfix in Spamassassin utility by Dick Visser.
Xamime email content management system.
Postfix+Amavis+ClamAV+Spamassassin howto by Tobias Rice.
ClamSMTP content filter based on the ClamAV anti-virus software.
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.
Anti-spam gateway howto using OpenBSD, Postfix, amavisd-new, SpamAssassin, Razor and DCC.
per-user SpamAssassin filtering by Mikko Pikarinen.
amavisd-new/Razor/SpamAssassin setup tutorial by Scott Henderson.
mailscanner system, works with Postfix and other MTAs. WARNING: This software uses unsupported methods to manipulate Postfix queue files directly. This will result in corruption or loss of mail. The mailscanner authors have sofar refused to discuss a proper access API or protocol.
avcheck utility by Michael Tokarev. Interfaces to several virus scanning engines.
amavis system, works with Postfix and other MTAs.
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.
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.
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.

Disclaimers

altermimepro disclaimer management system by Paul L Daniels.

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 howto, including blocking mail for non-existent addresses, by Pasztor Gyorgy.
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.
Postscreen-Stats by Julien Vehent.
multitail logfile analyzer utility, with color scheme, by Folkert van Heusden.
Spamrep detailed server, user, and domain reports on filter activity.
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...").

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

quota policy daemon script by Pablo Armando.
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.