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  1. Read any extra info available with the plugins, including the comments in the .cf files, or the POD documentation in the .pm file.
  2. Check to make sure that the default scores fit your installation. You might want to modify scores.
  3. Make sure to --lint the rules after loading them.
  4. 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

TesseractOCR

Mail::SpamAssassin::Plugin::AttachmentDetail

SpamAssassin plugin to check attachment detailsImage scanning with Tesseract OCR engine

Created by: MailCleaner / Fastnet SAKent Oyer

License Type: Apache License, Version 2.0?

Status: Active

Maintained as of: 20202023-0305-0218

Added: 20202023-0305-0218

Available at: https://github.com/MailCleaner/TesseractOcrmxguardian/Mail-SpamAssassin-Plugin-AttachmentDetail

Mail::SpamAssassin::Plugin::RedisAWLASCII

SpamAssassin plugin to convert non-ASCII characters to their ASCII equivalentsredis support for spamassassin AWL/TxRep

Created by: Markus Benning

Contact: https://markusbenning.de/

License Type: Apache License, Version 2.0

Status: Active

Kent Oyer

License Type: ?

Status: Active

Maintained as of: 20152023-0605-0812

Added: 20152023-0605-1112

Available at: https://metacpangithub.orgcom/releasemxguardian/Mail-SpamAssassin-Plugin-RedisAWLASCII

Mail::SpamAssassin::Plugin::RuleTimingRedisPDFInfo2

Improved PDF Plugin for SpamAssassincollect SA rule timings in redis

Created by: Markus BenningContact: https://markusbenning.de/Kent Oyer

License Type: Apache License, Version 2.0?

Status: Active

Maintained as of: 20152023-0601-0826

Added: 20152023-0601-1126

Available at: https://metacpangithub.orgcom/releasemxguardian/Mail-SpamAssassin-Plugin-RuleTimingRedisPDFInfo2

Note: The collectd plugin CollectdMail::SpamAssassin::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

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: 2015-06-11Added: 2015-05-14

Available at: https://githubmetacpan.comorg/eilandert/Botnet.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: 2013-03-13

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: 2015-05-14Added: 2010-09-17

Available at: https://github.com/smfreegardeilandert/DecodeShortURLsBotnet.pm

MTX

A distributed DNS whitelist. (Named after MX records plus the abbreviation "TX" for "transmit".)

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