bogofilter を Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper でインストール

プロジェクトリンク

• ホームページ
• リポジトリ
• 上流ドキュメント
• パッケージマネージャページ

コマンドとエイリアス

• bf_compact
• bf_copy
• bf_tar
• bogofilter
• bogolexer
• bogotune
• bogoupgrade
• bogoutil

プロジェクトの歴史

Bogofilter appeared during the early-2000s wave of Bayesian spam filtering. Its official home page credits Eric S. Raymond with the initial version and says that, since 2002, David Relson, Matthias Andree, Greg Louis, and other open source volunteers brought it to maturity.

The project explicitly roots its statistical approach in Paul Graham's 2002 article on Bayesian spam filtering and Gary Robinson's refinements, including the Fisher inverse chi-square technique. The man page describes further practical engineering: MIME decoding, HTML parsing, token handling for hosts and IP addresses, and production-oriented database lookups.

The release history shows a long maintenance arc from the 1.2.x line into 1.3.0 release candidates. Recent entries include the 2019 Git repository conversion, maintenance after David Relson's death, C99 cleanup, SQLite3 driver work, and the 2025 decision to make SQLite3 the default database driver.

採用の歴史

Bogofilter was adopted by Unix mail users who wanted a local, trainable spam classifier that could plug into delivery agents and desktop mail clients. The official home page names KMail, Evolution, Claws Mail, maildrop, and procmail-style integration as usage surfaces.

Its package reach is broad for a mail-filtering utility: the input package facts list Alpine, Homebrew, Debian, Fedora, MacPorts, Nix, Arch, Ubuntu, and openSUSE packaging. That distribution spread reflects how Bayesian filtering became normal infrastructure for local mail setups before hosted mail spam filtering took over much of the mainstream market.

使われ方

Common usage is pipeline-oriented: feed a message to `bogofilter`, inspect its spam, ham, or unsure result, and train it with known spam and non-spam examples. Companion tools such as `bogoutil`, `bogotune`, `bogolexer`, and database copy/compact helpers support training, tuning, inspection, and migration.

The man page emphasizes script-friendly behavior, including terse modes, passthrough headers, bulk processing, explicit registration as spam or non-spam, and configuration options for wordlists and database directories.

パッケージ好きにとっての重要性

Bogofilter is package-nerd significant because it captures a specific era of open source mail culture: local Unix mail delivery, procmail/maildrop recipes, Berkeley DB wordlists, and statistical filtering that users trained themselves.

It is also an example of a mature C utility where packaging choices matter. Database backend support, Unicode and MIME handling, config-file defaults, and migration tooling all directly affect whether an upgrade preserves a user's trained corpus.

タイムライン

• 2002: Initial Bogofilter work by Eric S. Raymond is followed by maturation by David Relson, Matthias Andree, Greg Louis, and volunteers.
• 2003: Paul Graham's later Bayesian filtering work and Gary Robinson's refinements are reflected in Bogofilter's documented algorithmic approach.
• 2013: Matthias Andree becomes maintainer after David Relson's long maintainership.
• 2019: The source repository is converted to Git; Bogofilter 1.2.5 is released.
• 2024: 1.3.0 beta work resumes with Unicode, lexer, and corruption fixes.
• 2025: 1.3.0 release candidates make SQLite3 the default database driver.

Related projects

• Related projects include SpamAssassin, DSPAM, CRM114, procmail, maildrop, KMail, Evolution, and Claws Mail. Bogofilter occupies the small, fast, user-trained filter niche rather than the rule-heavy network-scored niche associated with SpamAssassin.

ソース

• https://bogofilter.sourceforge.io/
• https://bogofilter.sourceforge.io/NEWS
• https://bogofilter.sourceforge.io/faq.shtml
• https://bogofilter.sourceforge.io/man_page.shtml
• input.source_facts.package-manager