MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project
https://github.com/SpamTagger
[antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready.
MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet...