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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head><title>Postfix Add-on Software</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link rel="stylesheet" type="text/css" href="postfix.css"></head> <body><div id="left"> <p> <img src="mysza.gif" alt="[LOGO]" height="91" width="130"> </p> <p class="navhead">QUICK LINKS</p> <p class="nav"><a href="start.html">Home</a> </p> <p class="nav"><a href="announcements.html">Announcements</a> </p>  <p class="nav"><a href="features.html">Feature overview </a> </p> <p class="nav"><a href="web-sites.html">Web sites (text)</a> </p> <p class="nav"><a href="download.html">Download (source)</a> </p> <p class="nav"><a href="lists.html">Mailing lists</a> </p> <p class="nav"><a href="press.html">Press and Interviews</a> </p> <p class="nav"><a href="documentation.html">Documentation</a> </p>  <p class="nav"><a href="addon.html">Add-on Software</a> </p> <p class="nav"><a href="packages.html">Packages and Ports</a> </p> <p class="nav"><a href="mirror.html">Becoming a mirror site</a> </p> <p class="navhead"></p> <form method="get" action="https://www.google.com/search"> <p class="nav"> <input size="0" value="Search" type="submit"><br> <input name="q" size="16" maxlength="255" value="" type="text"> <input name="sitesearch" value="www.postfix.org" type="hidden"> </p> </form> </div> <div id="main"> <h1>Postfix Add-on Software</h1> <p> 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. </p> <blockquote> <p class="nav"> <a href="#auth">authentication</a> | <a href="#arch">archival</a> | <a href="#web">webmail & groupware</a> | <a href="#security-gateway">PGP/SMIME gateways</a> | <a href="#policy">policy servers/libraries</a> | <a href="#poke">open proxy/relay detection</a> </p> <p class="nav"> <a href="#before">before smtp auth</a> | <a href="#certified">certified email</a> | <a href="#config">run/configuration/queue/user mgt</a> | <a href="#cont-mgt">content management</a> | <a href="#content">virus/spam content filters</a> </p> <p class="nav"> <a href="#cover">disclaimers</a> | <a href="#fax">fax<->mail</a> | <a href="#lists">list managers</a> | <a href="#logfile">logfile analysis</a> | <a href="#lookup">lookup tables</a> | <a href="#pop">pop/imap</a> | <a href="#autoreply">autoreply</a> <br> </p> <p class="nav"><a href="#quota">quota</a> | <a href="#clients">miniature clients</a> | <a href="#other">other</a> </p> </blockquote> <p> 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: </p> <ul> <li>Utility, system - requires no change to Postfix source code. </li> <li>Patch - requires making changes to Postfix source code. </li> <li>Howto - examples of using add-on software with Postfix. </li> </ul> <h3><a name="auth">Authentication</a></h3> <ul> <li> <a href="http://www.trusteddomain.org/opendmarc/">OpenDMARC</a> library and Milter plugin for DMARC verification. </li> <li> <a href="http://www.pwhois.org/milter.who">Prefix WhoIs Milter</a> annotates an email message with information about the remote SMTP client IP address (City, Country, ISP). <li> <a href="http://www.opendkim.org">OpenDKIM</a> Milter plugin for Domain Keys Identified Mail. </li> <li> <a href="http://jason.long.name/dkfilter/">dkfilter</a> mail signing filter by Jason Long; now replaced by <a href="http://dkimproxy.sourceforge.net/">DKIMproxy</a> </li> <li> <a href="http://sourceforge.net/projects/dkim-milter/">dkim-milter</a> domainkeys identified mail signer/verifier; now replaced by OpenDKIM </li> <li> <a href="http://sourceforge.net/projects/dk-milter/">dk-milter</a> domainkeys signer/verifier. See also the Postfix <a href="http://www.postfix.org/MILTER_README.html">MILTER_README</a> documentation. </li> <li> <a href="https://rspamd.com/">Rspamd</a> provides a Milter plugin. <li> <a href="https://www.clamav.net/">ClamAV</a> provides a Milter plugin. <li> <a href="https://savannah.nongnu.org/projects/spamass-milt/"> spamass-milter</a> is a Milter plugin for SpamAssassin. <li> <a href="http://sourceforge.net/projects/sid-milter/">sid-milter</a> Sender-ID verifier. See also the Postfix <a href="http://www.postfix.org/MILTER_README.html">MILTER_README</a> documentation. </li> </ul> <h3><a name="arch">Archival</a></h3> <ul> <li> The <a href="https://www.mailpiler.org">piler</a> secure email archive. </li> </ul> <h3><a name="web">Webmail & Groupware</a></h3> <ul> <li> <a href="https://meqaris.sourceforge.io/">Meqaris</a>, (Meeting Equipment and Room Invitation System) is a system that allows booking meeting rooms and other resources using the same e-mail invitations that are used to invite participants to meetings. </li> <li> <a href="http://modoboa.org/">Modoboa</a> mail hosting platform by Antoine Nguyen. </li> <li> <a href="http://www.tummy.com/software/vpostmaster/">vPostmaster</a> mail server with policy filters, POP3, IMAP, webmail, greylisting. Free for non-commercial use. </li> <li> <a href="http://www.roundcube.net">Roundcube</a> browser-based mail client with a desktop-like user interface. </li> <li> <a href="http://www.zimbra.com/">Zimbra</a> Collaboration Suite with email, contact management and group calendaring. </li> <li> <a href="http://phpgroupware.org">phpGroupWare</a> multi-user groupware suite written in PHP. </li> <li><a href="http://www.squirrelmail.org/">Squirrelmail</a> PHP4 based system. </li> <li><a href="http://openwebmail.org/">OpenWebmail</a> system. </li> <li><a href="http://horde.org/imp/">IMP</a> system. </li> </ul> <h3><a name="security-gateway">PGP/SMIME Gateways</a></h3> <ul>  <li> <a href="http://www.djigzo.com">CipherMail</a> (formerly: DjigZo) Open source email encryption gateway. </li> <li> <a href="http://freshmeat.net/projects/z1securemailgateway/"> Z1 SecureMail Gateway</a> Security server for email using S/MIME and PGP. </li> </ul> <h3><a name="policy">Policy servers/libraries</a></h3> <ul> <li><a href="http://mtpolicyd.org">mtpolicyd</a> a modular policy daemon for Postfix by Markus Benning. <li><a href="http://www.aspl.es/valvula">Valvula</a> high-performance mail policy daemon in C that provides out of the box support for sender login mismatch, mail quotas, per user/domain black/whitelists and white-lists and more. <li><a href="http://code.google.com/p/gross/">Gross</a> greylist server by Eino Tuominen and Antti Siira.</li> <li><a href="http://pfxpold.wiki.sourceforge.net/">pfxpold</a> policy daemon with plug-in policy support by Martin Schmitt. </li> <li><a href="http://postgrey.schweikert.ch/">Postgrey</a> greylist policy server in Perl by David Schweikert. </li> <li><a href="http://policyd.sourceforge.net">policyd</a> 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. </li> <li><a href="http://postfwd.org/">postfwd</a> policy server, written in Perl, combines complex Postfix restrictions in a ruleset similar to those of the most firewalls. </li> <li><a href="https://launchpad.net/apolicy">apolicy</a> or "ACL Policy Daemon" in Python by Miguel Filho. </li> <li><a href="http://kmlinux.fjfi.cvut.cz/%7Evokac/activities/ppolicy/"> ppolicy</a> policy server in Python, by Petr Vokac. </li> <li><a href="http://www.corpit.ru/mjt/smtpd-policy-template.pl"> smtpd-policy-template</a> skeleton policy server in Perl by Michael Tokarev. </li> <li><a href="http://www.gasmi.net/gld.html">gld</a> greylist server with MySQL database by Salim Gasmi. </li> <li><a href="http://sqlgrey.sourceforge.net">SQLgrey</a>: greylist policy server with auto-whitelisting in Perl with support for PostgreSQL, MySQL and SQLite storage by Lionel Bouton. </li> <li><a href="http://mimo.gn.apc.org/greylist">Greylist daemon</a> greylist policy server in C++ using MySql, Postgres, or SQLite by Michael Moritz (used to be gps.) </li> <li><a href="http://www.kim-minh.com/pub/greyfix/"> Greyfix </a> greylist policy server in C with Berkeley DB database by Kim Minh Kaplan.  </li> <li><a href="http://www.tummy.com/Community/software/tumgreyspf/"> tumgreyspf</a> 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. </li> <li><a href="http://software.schmorp.de/pkg/libspf.html">libspf</a> and <a href="http://www.libspf2.org/">libspf2</a> libraries </li> <li><a href="http://www.linuxrulz.org/nkukard/postfix/">libspf2</a> patch by Nigel Kukard. </li> <li><a href="http://www.ipnet6.org/postfix/spf/">libspf2</a> patch by Dean Strik. </li> </ul> <p> 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. </p> <h3><a name="poke">Open relay/proxy detection</a></h3> <ul> <li><a href="http://www.zonque.org/projects/grinch/">grinch</a> utility by Daniel Mack. On request by Postfix, it finds out if a host is an open mail relay and caches the result. </li> <li><a href="http://www.corpit.ru/mjt/proxycheck.html">proxycheck </a> open proxy detection utility by Michael Tokarev. Some additional scripting is required to integrate with Postfix. </li> </ul> <h3><a name="before">Before SMTP authentication</a></h3> <ul> <li><a href="http://popbsmtp.sf.net/"> pop-before-smtp</a> utility by Bennett Todd. </li> <li><a href="http://www.arschkrebs.de/postfix/postfix_pop-before-smtp_en.shtml"> pop-before-smtp</a> howto by Ralf Hildebrandt. </li> <li><a href="http://www.arschkrebs.de/postfix/postfix_drac.shtml"> DRAC</a> howto by Ralf Hildebrandt.  </li> </ul> <h3><a name="certified">Certified email</a></h3> <ul> <li> <a href="http://openpec.sourceforge.net/">OpenPec</a> Certified email system by <a href="http://www.exentrica.it">EXEntrica S.r.l.</a>. </li> </ul> <h3><a name="config">Run/Configuration/Queue/User management</a></h3> <ul> <li> <a href="https://github.com/apm-it/mmq"> mmq manager mail queue for Postfix</a> by APM-IT. Commercial use requires a license. For non-commercial use, send email. <li> <a href="http://www.posty-soft.org/">postY</a> Administrative tool for Postfix. <li> <a href="https://rseichter.github.io/automx2/">automx2</a> Email client configuration made easy. <li> <a href="http://cyrup.sf.net/">Cyrup</a> lightweight virtual domains/users management web tool by Yuri Pimenov and Deniss Gaplevsky. </li> <li> <a href="http://www.opensolutions.ie/open-source/vimbadmin">ViMbAdmin</a> Virtual Mailbox Administration web application by Open Solutions, Ireland. </li> <li> <a href="http://www.korreio.sf.net">Korreio</a> 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. </li> <li> <a href="http://www.kyapanel.com">KyaPanel</a> server manager from Anahuac. </li> <li> <a href="http://www.phamm.org">Phamm</a> Web Based Management tool for Virtual Domains and Virtual Users that are stored in LDAP. </li> <li> <a href="http://www.postconf.com/">POSTCONF Mail Server</a>. </li> <li> Running Postfix with <a href="http://www.petertribble.co.uk/Solaris/smf.html"> Solaris 10 SMF</a> by Geoff Gibbs. </li> <li> <a href="http://sourceforge.net/projects/ravencore/">RavenCore Hosting Control panel</a> 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. </li> <li> <a href="http://pfqueue.sourceforge.net/">pfqueue</a> Postfix queue management utility. </li> <li> <a href="http://sourceforge.net/projects/postfixadmin/"> Postfix Admin</a> a Web Based Management tool for Virtual Domains and Virtual Users that are stored in MySQL. </li> <li><a href="http://www.webmin.com/webmin/">webmin</a> system has a Postfix configuration module. </li> <li>webmin system <a href="http://doxfer.webmin.com/Webmin/PostfixConfiguration"> documentation</a>. </li> <li><a href="http://www.loomsday.co.nz/development?id=tequila">tequila</a> system for Postfix configuration management, including mail forwarding and autoreply. </li> <li><a href="http://www.postfixvirtual.net/">postfixmanager</a> howto for a Postfix/Courier-IMAP/Courier-maildrop/Cyrus-SASL/MySQL/spamassassin/amavisd-new/ClamAV setup, by Genco YILMAZ. </li> <li><a href="http://archives.neohapsis.com/archives/postfix/2002-05/0027.html"> BASH script</a> for automatic completion of postconf commands by Carsten Hoeger. </li> </ul> <h3><a name="cont-mgt">Content management</a></h3> <ul> <li><a href="http://fex.rus.uni-stuttgart.de/usecases/BIGMAIL.html">BIGMAIL</a> filter to replace large attachments with link to F*EX server. Author Ulli Horlacher.</li> </ul> <h3><a name="content">Virus/SPAM content filters</a></h3> <ul> <li> <a href="https://github.com/jons/node-milter">node.js Milter bindings</a> (write Milters in Javascript) by jons. <li> <a href="https://github.com/MiroslavHoudek/postfix-filter-loop"> postfix-filter-loop</a> SMTP-based content filter (skeleton) in Python by Miroslav Houdek. <li><a href="https://www.cloudmark.com/en/s/products/cloudmark-authority-milter"> Cloudmark Authority Milter</a> High performance spam, phishing, and malware protection for your Postfix installation. <li><a href="http://fuglu.org/">Fuglu</a> modular pre/after queue content filter written in python, by O. ("oli") Schacher. <li><a href="http://milter-manager.sourceforge.net/">milter manager</a> utility by Kenji Okimoto. <li><a href="http://www.kaspersky.com/linux-mail-security/">Kaspersky</a> Linux Mail Security system. </li> <li><a href="http://www.ijs.si/software/amavisd/">amavisd-new</a> utility, a high-performance interface between MTA and virus/SPAM scanners. </li> <li><a href="http://solutions.drweb.com/maild/">Dr.Web</a> anti-virus & anti-spam for Telecoms and businesses with heavy mail traffic; available as solution and SDK. </li> <li><a href="http://messagepartners.com/solutions/mpp_postfix.html"> MPP for Postfix</a> antivirus, antispam, archival, access control, content filtering, thresholds, auto-black lists, spam traps, and more. </li> <li><a href="http://spamassassin.apache.org/"> SpamAssassin</a> mail labeling system. </li> <li><a href="http://www.j-chkmail.org">j-chkmail</a> a Milter based spam/virus solution for heavy traffic. Includes greylisting, client rate limits (connection rate, message rate, simultaneous connections, ...), statistical filter on content, and more. </li> <li><a href="http://www.terena.org/%7Evisser/awl.php">Automagically whitelist recipients from postfix in Spamassassin</a> utility by Dick Visser. </li> <li><a href="http://www.pldaniels.com/xamimelt/about.php">XamimeLT</a> email content management system. </li> <li><a href="https://www.fatofthelan.com/technical/how-to-install-postfix-dovecot-amavis-clamav-and-spamassassin-etch/"> Postfix+Amavis+ClamAV+Spamassassin</a> howto by Tobias Rice. </li> <li><a href="http://memberwebs.com/nielsen/software/clamsmtp/"> ClamSMTP</a> content filter based on the ClamAV anti-virus software. </li> <li><a href="http://www.pc-tools.net/unix/renattach/"> renattach</a> 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. Discontinued by author. </li> <li><a href="http://www.wdg.us/index.cfm/rd/mta/spampd.htm"> spampd</a> spam filtering, transparent SMTP/LMTP proxy using SpamAssassin, in Perl by Maxim Paperno. </li> <li><a href="http://www.goblet.net/spamkill/">per-user</a> SpamAssassin filtering by Mikko Pikarinen. </li> <li><a href="http://www.mailscanner.info/">MailScanner</a> system, works with Postfix and other MTAs. Note: MailScanner versions before 5.1 use unsupported methods to manipulate Postfix queue files directly, and can result in corruption or loss of mail. </li> <li><a href="http://www.corpit.ru/avcheck/"> avcheck</a> utility by Michael Tokarev. Interfaces to several virus scanning engines. </li> <li><a href="http://amavis.sourceforge.net/">amavis</a> system, works with Postfix and other MTAs. </li> <li><a href="http://home.pages.de/%7Emandree/postfix/HOWTO-maildrop.html"> maildrop</a> howto by Matthias Andree. The maildrop delivery agent is part of the <a href="http://www.courier-mta.org/"> Courier</a> mail server software. </li> <li><a href="http://mailtools.anomy.net/"> anomy</a> email sanitizer system. </li> <li><a href="http://advosys.ca/tips/postfix-filtering.html"> anomy</a> howto by Derrick Webber. </li> <li><a href="https://github.com/jnorell/smtpprox"> smtpprox</a> generic SMTP filtering proxy by Bennett Todd. </li> <li><a href="http://www.impsec.org/email-tools/procmail-security.html"> procmail</a> howto for sanitizing email by John D. Hardin. </li> <li><a href="http://crm114.sourceforge.net/"> crm114</a> mail content inspection system. </li> <li><a href="http://tmda.sourceforge.net/">Tagged Message Delivery Agent (TMDA)</a> by Jason R. Mastaler, a system that requires unknown senders to send confirmation before they are put on a whitelist. </li> <li><a href="http://jimsun.linxnet.com/misc/postfix-anti-UCE.txt"> Postfix Anti-UCE Cheat-Sheet</a> by Jim Seymour. </li> <li><a href="http://www.arschkrebs.de/postfix/"> UCE and other</a> howtos by Ralf Hildebrandt. </li> <li><a href="http://www.kfki.hu/%7Ekadlec/sw/postfix_patch.html">Per-user UCE controls</a> patch by Jozsef Kadlecsik. </li> <li><a href="http://taz.net.au/postfix/scripts/">RBL</a> analysis tools by Craig Sanders. </li> </ul> <h3><a name="cover">Disclaimers</a></h3> <ul> <li><a href="http://freecode.com/projects/altermimepro">altermimepro</a> disclaimer management system by Paul L Daniels. </li> </ul> <h3><a name="fax">Fax<->Email software</a></h3> <ul> <li> <a href="http://www.faximum.com/">Faxmimum</a> Fax Messaging Server (FMS) integrates with Postfix and other MTAs and provides email-to-fax and fax-to-email gateways. </li> </ul> <h3><a name="lists">List managers</a></h3> <ul><li><a href="http://archives.neohapsis.com/archives/postfix/2001-09/1527.html"> Listar</a> howto by Craig Sanders. </li> <li><a href="http://www.gnu.org/software/mailman/mailman.html">Mailman</a>, the GNU Mailing List Management System. </li> <li><a href="http://www.csh.rit.edu/%7Ejon/projects/majordomo/#postfix"> majordomo</a> howto by Jon Parise. </li> <li><a href="http://www.procmail.org/"> SmartList</a> Mailing List Management System <a href="http://archives.neohapsis.com/archives/postfix/2001-07/0782.html"> howto</a>. </li> </ul> <h3><a name="logfile">Logfile analysis</a></h3> <ul> <li> <a href="https://gitlab.com/lightmeter/controlcenter/">Lightmeter Control Center</a>, the Open Source mailops monitoring application. <li> <a href="https://www.skit.cz/nabidka-sluzeb/email-analytics-for-postfix/"> Mailstats for Postfix</a> logfile analysis service by 艩m铆d a Kasal. <li>Postfix integration with <a href="https://postmastery.com/analytics">Postmastery email delivery analytics</a>. <li><a href="http://jimsun.LinxNet.com/postfix_contrib.html"> pflogsumm</a> logfile analyzer utility by Jim Seymour. </li> <li><a href="https://github.com/jvehent/Postscreen-Stats"> Postscreen-Stats</a> by Julien Vehent. </li> <li><a href="http://www.vanheusden.com/multitail/">multitail</a> logfile analyzer utility, with color scheme, by Folkert van Heusden. </li> <li><a href="http://www.postconf.com/docs/spamrep/">Spamrep</a> detailed server, user, and domain reports on filter activity. </li> <li><a href="http://awstats.sourceforge.net/">AWStats</a> logfile analyzer system. </li> <li><a href="http://anteater.sourceforge.net/">Anteater </a> logfile analysis system by Tobias Erbsland. </li> <li><a href="http://mailgraph.schweikert.ch/"> mailgraph</a>, an RRDtool frontend utility by David Schweikert. </li> <li><a href="http://taz.net.au/postfix/mrtg/">mailstats</a> logfile analyzer utility by Craig Sanders.  </li> <li><a href="https://https://comparite.ch/log-tools">Comparitech</a> log analyzer review. </li> <li><a href="http://sourceforge.net/projects/logrep">Logrep</a> logfile analyzer system. </li> <li><a href="http://www.enderunix.org/isoqlog/">Isoqlog</a> logfile analyzer system (also supports qmail and Sendmail). </li> </ul> <h3><a name="lookup">Lookup tables</a></h3> <ul> <li><a href="http://d.scn.ru/proj/postfix/">pam</a> lookup table by Andrew I Baznikin; for example, use this to implement local_recipient_maps with RADIUS. </li> <li><a href="ftp://ftp.hgmp.mrc.ac.uk/pub/ggibbs/nisplus.tar.gz"> NIS+</a> patch by Geoff Gibbs. </li> <li><a href="ftp://ftp.corpit.ru/pub/tinycdb/">tinycdb</a> Michael Tokarev's own CDB implementation. </li> </ul> <h3><a name="pop">POP/IMAP servers</a></h3> <p> For howto documents, see <a href="docs.html">Howtos and FAQs</a>. </p> <ul> <li><a href="http://www.dovecot.org/">Dovecot</a> system implements IMAP and POP, and supports TLS. </li> <li><a href="http://vergenet.net/linux/perdition/"> perdition</a> system is a smart POP/IMAP <b>proxy</b> that connects users to the "right" POP/IMAP server. </li> <li><a href="http://asg.web.cmu.edu/cyrus/">Cyrus IMAP</a> system implements IMAP, POP3, JMAP and KPOP. This software implements its own private mail database system. </li> <li><a href="http://mirror.omadata.com/onno/library-sw-hw/linux-1/postfix/vmailadmin/">vmail admin</a> 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. </li> <li><a href="http://www.courier-mta.org/imap/">Courier-Imap</a> 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). </li> <li><a href="http://www.eudora.com/qpopper/">Qpopper</a> system supports POP3, TLS (SSL), and uses the traditional UNIX-style mailbox format (multiple messages per file, each message starts with "From sender date..."). </li> </ul><h3><a name="autoreply">Autoreply software</a></h3> <ul> <li><a href="http://www.mshsoftware.com/msh-free-autoresponder"> MSH Free Autoresponder</a> is a Milter plugin that creates autoreplies on the basis of configurable criteria. </li> <li>Autoreply system <a href="http://unwin.org/postfix/">architecture</a> by Joshua E. Warchol. You still need to provide the PERL script that does the actual responding. </li> <li><a href="http://www.onyxbits.de/gnarwl/">gnarwl</a> autoreply utility by Patrick Ahlbrecht. This uses LDAP instead of .forward+vacation. </li> </ul> <h3><a name="quota">Quota software</a></h3> <ul> <li><a href="http://sys4.de/en/blog/2013/04/08/postfix-dovecot-mailbox-quota/"> Postfix/Dovecot</a> quota support. </li> <li><a href="http://www.linuxrosario.com.ar/proyectos.html">quota</a> policy daemon script by Pablo Armando. </li> <li><a href="http://www.cpan.org/modules/by-authors/id/R/RM/RMALAFAIA/postmmon/"> PostmMon</a> Postfix Mail Box Monitor by Eduardo Mendes and Ricardo Malafaia. This sends mail notifications when a user has too much mail. </li> </ul> <h3><a name="clients">Miniature client software</a></h3> <ul> <li><a href="http://www.acme.com/software/mini_sendmail/"> mini_sendmail</a> utility by Jef Poskanzer, a minimal program to submit mail over SMTP, for example, from a chrooted WWW server. </li> </ul> <h3><a name="other">Other software</a></h3> <ul><li><a href="ftp://ftp.corpit.ru/pub/postfix/README"> Patches</a> by Michael Tokarev.  </li> <li><a href="http://asteroid-b612.org/software/"> Patches</a> by Cygnus: mail spool hashing, mailbox size limit, maildir size limit. </li> </ul> </div> </body></html>