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Apache SpamAssassin: History, Works & Art

Apache SpamAssassin is a computer program used for e-mail spam filtering. It uses a variety of spam-detection techniques, including DNS and fuzzy checksum techniques, Bayesian filtering, external programs, blacklists and online databases. It is released under the Apache License 2.0 and is a part of the Apache Foundation since 2004.

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Apache SpamAssassin topic overview

The analysis highlights History, Works and Art as prominent areas in the source structure around Apache SpamAssassin.

Related topics
47
Source areas
8
Connected nodes
55
Extracted relationships
77
Concept neighborhoods
22
Bridge connections
55

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Methods of usage · 14 topics
Network-based filtering methods · 10 topics
Overview · 9 topics
Licensing · 6 topics
History · 3 topics
Operation · 2 topics
Testing · 2 topics
Sa-compile · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Developer
Apache Software Foundation
License
Apache License 2.0
Operating system
Cross-platform
Release
April 20, 2001; 25 years ago (2001-04-20)
Repository
SpamAssassin Repository
Stable release
4.0.2 / 30 August 2025; 11 months ago (30 August 2025)

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Methods of usage

Operation

Network-based filtering methods

Licensing

Sa-compile

Testing

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Apache SpamAssassin connects Entity context

The extracted context around Apache SpamAssassin shows recurring relationship patterns in the source. For example, Apache SpamAssassin → Amavis, Cloudmark Authority, CPAN, Distributed Checksum Clearinghouse, DNS-based, DomainKeys Identified MailURI, Exiscan, Hashcash, It, Mail, MailScanner, March, Milter, MIMEDefang, Perl-based, Policy Framework, SA-Exim, SpamAssassin, SURBL, The Another extracted example is Apache SpamAssassin → Apache License, Artistic License, GNU General Public License, Kerio, Kerio MailServer, Many, McAfee, SpamAssassin, SpamKiller, Versions. Use these groups to spot repeated connection types before inspecting the individual relationships.

Apache SpamAssassin

Top relations

has method · 24
Apache SpamAssassin → Amavis, Cloudmark Authority, CPAN, Distributed Checksum Clearinghouse, DNS-based, DomainKeys Identified MailURI, Exiscan, Hashcash, It, Mail, MailScanner, March, Milter, MIMEDefang, Perl-based, Policy Framework, SA-Exim, SpamAssassin, SURBL, The
related to Licensing · 10
Apache SpamAssassin → Apache License, Artistic License, GNU General Public License, Kerio, Kerio MailServer, Many, McAfee, SpamAssassin, SpamKiller, Versions
related to history · 9
Apache SpamAssassin → Apache Software Foundation, April, August, In Summer, Jeftovic's, Justin Mason, Mark Jeftovic, Mason, SourceForge
related to Bayesian filtering · 6
Apache SpamAssassin → Alternatively, Bayesian, For, Regardless, SpamAssassin's Bayesian, Typically
related to External links · 5
Apache SpamAssassin → Apache SpamAssassinKAM, KAM Ruleset, Official, SpamAssassin WikiApache SpamAssassin Rule, Updates Wiki Automatically
related to Operation · 4
Apache SpamAssassin → Each, Most, SpamAssassin, The
related to Testing · 4
Apache SpamAssassin → EICAR, GTUBE, If, RFC
Developer · 1
Apache SpamAssassin → Apache Software Foundation
License · 1
Apache SpamAssassin → Apache License 2.0
Operating system · 1
Apache SpamAssassin → Cross-platform

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

spamassassin apache spam mail filter message score used also filtering program bayesian software license user rules programs foundation based tests

Apache SpamAssassin relationships Subject–Predicate–Object triples

TTTA extracted 77 structured relationships around Apache SpamAssassin. Examples in this analysis include Apache SpamAssassin → Developer → Apache Software Foundation and Apache SpamAssassin → License → Apache License 2.0. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Apache SpamAssassinDeveloperApache Software Foundation1.00infobox
Apache SpamAssassinLicenseApache License 2.01.00infobox
Apache SpamAssassinOperating systemCross-platform1.00infobox
Apache SpamAssassinReleaseApril 20, 2001; 25 years ago (2001-04-20)1.00infobox
Apache SpamAssassinRepositorySpamAssassin Repository1.00infobox
Apache SpamAssassinStable release4.0.2 / 30 August 2025; 11 months ago (30 August 2025)1.00infobox
Apache SpamAssassinTypeSpam filter1.00infobox
Apache SpamAssassinWebsitespamassassin.apache.org1.00infobox
Apache SpamAssassinWritten inPerl, C1.00infobox
Apache SpamAssassinis acomputer program used for e-mail spam filtering0.90text
procmail can be made to pipe all incoming mail through Apache SpamAssassin with an adjustment to a user's procmailrc fileinstance ofMail filter programs0.80text
the Distributed Checksum Clearinghouseinstance ofDNS-based blacklists and DNS-based whitelistsFuzzy-checksum-based spam detection filters0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Apache SpamAssassin bring nearby vocabulary together. In this analysis, examples include Spamassassin, Spam and Software. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Apache SpamAssassin
    • Spamassassin
    • Spam
    • Software
    • Filter
    • Message
    • Mail
    • Also
    • File
    • Foundation
    • Based
    • Filtering
    • License
  • apache spamassassin
    • Spamassassin
    • Spam
    • Software
    • Filter
    • Message
    • Mail
    • Also
    • Rules
    • File
    • Foundation
    • Based
    • Filtering
  • e-mail spam filtering
    • Bayesian
    • External
    • Program
    • Message
    • Spamassassin
    • Filter
    • Ham
    • Blacklists
    • Checksum
    • Filtering
    • Perl
    • Spam
  • apache license 2.0
    • Spamassassin
    • Foundation
    • Software
    • Spam
    • Filter
    • Part
    • Perl
    • Message
    • Mail
    • Also
    • Program
    • File
  • apache foundation
    • Spamassassin
    • License
    • Software
    • Spam
    • Part
    • Perl
    • Filter
    • Message
    • Mail
    • Also
    • Program
    • File
  • mail server
    • Automatically
    • Filter
    • Supports
    • Also
    • User
    • Program
    • Spamassassin
    • Application
    • Called
    • Email
    • Programs
    • Sa-learn
  • mail programs
    • Filter
    • Supports
    • Blacklists
    • Also
    • User
    • File
    • Run
    • Techniques
    • Users
    • Spamassassin
    • Application
    • Called
  • apache software foundation
    • Spamassassin
    • License
    • Software
    • Spam
    • Part
    • Perl
    • Filter
    • Message
    • Mail
    • Also
    • Program
    • Techniques

Connections between topic areas Semantic bridges

For Apache SpamAssassin, one of the stronger structural bridges in this analysis connects Apache SpamAssassin with Methods of usage. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Apache SpamAssassin — Methods of usage · splits 41 ⟂ 15
Apache SpamAssassin — Network-based filtering methods · splits 45 ⟂ 11
Apache SpamAssassin — Overview · splits 46 ⟂ 10
Apache SpamAssassin — Licensing · splits 49 ⟂ 7
Apache SpamAssassin — History · splits 52 ⟂ 4
Apache SpamAssassin — Operation · splits 53 ⟂ 3
Apache SpamAssassin — Testing · splits 53 ⟂ 3

Map overview Semantic statistics

Apache SpamAssassin

Nodes56
Edges55
Triples77
Avg. degree1.96
Density0.035714
Components1

Source & methodology

TTTA analyzes the structure around Apache SpamAssassin to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Works & Art, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Apache SpamAssassin · EN edition · Analysis: TopicsToTalkAbout

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