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Please add links to third-party SA plugins to the bottom of this page. Note that only SpamAssassin 3.0.0 or later can use these. To use these, just place the file(s) in your SpamAssassin plugin directory, which may be /usr/share/perl5/Mail/SpamAssassin/Plugin/ (if you use spamd, be sure to restart); SpamAssassin will need at least 1 rule file (ending in .cf) to load the plugin, and that will typically use a loadplugin line to load a .pm file containing the plugin's perl code.
You can also keep the plugin's .pm file in your /etc/mail/spamassassin/ or /etc/spamassassin/ directory, but you need to specify the plugin's file name as the second argument to loadplugin. For example, a plugin named Mail::SpamAssassin::Plugin::MyPlugin with a filename of myplugin.pm:loadplugin Mail::SpamAssassin::Plugin::MyPlugin myplugin.pm
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Before running these plugins please do the following:
- Read any extra info available with the plugins, including the comments in the .cf files, or the POD documentation in the .pm file.
- Check to make sure that the default scores fit your installation. You might want to modify scores.
- Make sure to --lint the rules after loading them.
- Test the new plugin. Keep an eye on hits from the new rules to determine if the scoring is right for you.
Use at your own risk. These plugins are not generally audited for security, performance or compatibility for any specific SpamAssassin version.
Status Information
Active: Plugin is actively updated and maintained
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Plugins without a recent "Maintained as of:" date have been moved to UnmaintainedCustomPlugins. If you own one, or have confirmed that it is currently usable, feel free to move it back here and update that field.
Free Plugins
Mail::SpamAssassin::Plugin::AttachmentDetail
SpamAssassin plugin to check attachment details
Created by: Kent Oyer
License Type: ?
Status: Active
Maintained as of: 2023-05-18
Added: 2023-05-18
Available at: https://github.com/mxguardian/Mail-SpamAssassin-Plugin-AttachmentDetail
Mail::SpamAssassin::Plugin::ASCII
SpamAssassin plugin to convert non-ASCII characters to their ASCII equivalents
Created by: Kent Oyer
License Type: ?
Status: Active
Maintained as of: 2023-05-12
Added: 2023-05-12
Available at: https://github.com/mxguardian/Mail-SpamAssassin-Plugin-ASCII
Mail::SpamAssassin::Plugin::PDFInfo2
Improved PDF Plugin for SpamAssassin
Created by: Kent Oyer
License Type: ?
Status: Active
Maintained as of: 2023-01-26
Added: 2023-01-26
Available at: https://github.com/mxguardian/Mail-SpamAssassin-Plugin-PDFInfo2
Mail::SpamAssassin::Plugin::Esp
SpamAssassin plugin for Invaluement.com Service Provider DNSBLs ("SPBL")
Created by: Giovanni Bechis
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2020-08-23
Added: 2020-09-09
Available at: https://github.com/bigio/spamassassin-esp
Mail::SpamAssassin::Plugin::ClamAV
Virus check using Clamav antivirus
Created by: Giovanni Bechis
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2020-01-18
Added: 2020-06-04
Available at: https://github.com/bigio/spamassassin-clamav
TesseractOCR
Image scanning with Tesseract OCR engine
Created by: MailCleaner / Fastnet SA
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2020-03-02
Added: 2020-03-02
Available at: https://github.com/MailCleaner/TesseractOcr
Mail::SpamAssassin::Plugin::iXhash2
iXhash2 is an unofficial improved version of iXhash plugin for SpamAssassin, adding async DNS lookups for performance and removing unneeded features. It's fully compatible with the iXhash 1.5.5 (https://sourceforge.net/projects/ixhash/) implementation. It computes MD5 checksums of fragments of the body of an e-mail and compares them to those of know spam using DNS queries to a RBL-like name server.
Created by: Henrik Krohns
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2021-04-25
Added: 2021-04-25
Available at: https://mailfud.org/iXhash2/
Mail::SpamAssassin::Plugin::RedisAWL
redis support for spamassassin AWL/TxRep
Created by: Markus Benning
Contact: https://markusbenning.de/
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2015-06-08
Added: 2015-06-11
Available at: https://metacpan.org/release/Mail-SpamAssassin-Plugin-RedisAWL
Mail::SpamAssassin::Plugin::RuleTimingRedis
collect SA rule timings in redis
Created by: Markus Benning
Contact: https://markusbenning.de/
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2015-06-08
Added: 2015-06-11
Available at: https://metacpan.org/release/Mail-SpamAssassin-Plugin-RuleTimingRedis
Note: The collectd plugin Collectd::Plugins::RedisClient could be used to record counter values.
Botnet
Botnet looks for possible botnet sources of email by checking various DNS values that indicate things such as other ISP's clients or workstations, or misconfigured DNS settings that are more likely to happen with client or workstation addresses than servers. Mirrored for educational purposes with applied patches, as it seems abandonded and nowhere to be found. No other changes are done. As the plugin has some interesting idea's there might be a (partial) rewrite in the future.
Original Author: John Rudd
Maintainer: Thijs Eilander
Contact: via github
License Type: GNU General Public License
Status: Inactive but works fine on 3.4.1
Maintained as of: 2014-11-19
Added: 2015-05-14
Available at: https://github.com/eilandert/Botnet.pm
MTX
A distributed DNS whitelist. (Named after MX records plus the abbreviation "TX" for "transmit".)
Contact: Darxus
License Type: Apache
Status: Active
Maintained as of: 2018-03-02
Added: 2011-08-12
Available at: http://www.chaosreigns.com/mtx/
DSPAM
When using dspam in conjuction with SpamAssassin and amavisd-new, amavisd-new automatically has dspam calculate the probabability of a message being HAM/SPAM and then insert headers. If you have SA installed, the dspam information goes to waste. That is unless you take advantage of this plugin.
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Added: 2009-08-03
Available at: httphttps://www.fslgithub.com/support/SaveHits.pm
Mail::SpamAssassin::Plugin::DecodeShortURLs
Decodes shortened URLs via HTTP HEAD request to the shortening service and adds the decoded URL into the list of URIs extracted by SpamAssassin for other plugins to find (e.g. URIDNSBL).
Created by: Steve Freegard
Contact: steve.freegard at fsl.com
License Type: Apache
Status: Active
Maintained as of: 2011-03-21
Added: 2010-09-17
Available at: http://www.fsl.com/support/DecodeShortURLs.pm and http://www.fsl.com/support/DecodeShortURLs.cf
DNSWL spam reporting
Adds DNSWL to the services which receive a report via the command "spamassassin --report" (or -r).
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Status: Active
Maintained as of: 20112018-03-20 02
Added: 2011-02-21
Available at: http://www.chaosreigns.com/dnswl/sa_plugin/
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Available at: http://www.eric-a-hall.com/software/spamassassin-sagrey/
Commercial Plugins
Spamhaus Data Query Service Plugin for SpamAssassin
This plugin allows to get the most out of a Spamhaus Data Query Service (DQS) subscription.
Subscriptions operates on a "free for most" way, in the sense that if you meet the "Free use" restrictions listed here you are eligible for a free DQS key that you can register at https://www.spamhaustech.com/dqs/
DQS offer an increase of up to 42% in spam catch rate compared to Rsync or our public mirrors, as the Virus Bulletin test we routinely carry will show: https://www.virusbulletin.com/testing/results/latest/vbspam-email-security
Created by: Spamhaus Technology - Spamassassin Team
Contact: https://www.spamhaustech.com/
License Type: Apache License, Version 2.0
Status: Active
Maintained as of: 2019-06-25
Added: 2019-06-25 (date this entry was added)
Available at: https://docs.spamhaustech.com/40-real-world-usage/SpamAssassin/020-SpamAssassin.html
Note: Periodically tested by https://www.virusbulletin.com/testing/vbspam/
Commtouch Plug-in for SpamAssassin
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Status: Active
Maintained as of: 20112012-0302-21 20
Added: 2009-05-12
Available at: http://www.armresearch.com/products/SNF4SA.jsp
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