Web interfaces to SpamAssassin

Generic

webuserprefs [http://sourceforge.net/projects/webuserprefs/] This PHP front-end support web-based administration of both file-based and SQL installations, and a number of authentication options. Detailed configuration directions are [wiki:Self:SingleUserUnixInstall#head-1dd15c06b7e645638def3d2ed2ef31557d853659 available].
[http://www.maiamailguard.com Maia Mailguard] is a web-based interface and management system for the popular amavisd-new e-mail scanner and SpamAssassin. Written in Perl and PHP, Maia Mailguard gives end-users control over how their mail is processed by virus scanners and spam filters, while giving mail administrators the power to configure site-wide defaults and limits.

php-sa-mysql [http://sourceforge.net/projects/php-sa-mysql/]
phpsaadmin [http://www.misak.dk/blog/index.php/archives/category/phpsaadmin/]. For a demo see [http://www.misak.dk/blog/index.php/archives/2005/11/17/41/]
php-sa-mysql2 [http://mail.limelyte.net/downloads/standalone3.0.tgz]. For a Demo of php-sa-mysql2 see http://mail.limelyte.net/webspam/ user test <at> nougen.com, pass test. Notes: php-sa-mysql2 requires register_globals = On, a rewrite is in process.

There are numerous front ends to Spam Assassin for SquirrelMail, which can all be found at [http://squirrelmail.org/plugins_category.php?category_id=3]
php-sa-mysql-squirrel [http://mail.limelyte.net/downloads/squirrel-plugin.tgz]

Michael Moncur's spamconfig.php: [http://www.yrex.com/spam/spamconfig.php]. This generates a file suitable for download, rather than being a UI you can install on your server directly. This only works for SpamAssassin 2.5, not 2.6 or 3.0, and so should now be considered obsolete.