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An alternative is to use the smtp-vilter high-performance content filter using the sendmail milter API which has a backend for Spamassassins spamd. More details at http://www.etc.msys.ch/software/smtp-vilter/

Integrated into Postfix

http://www.geocities.com/scottlhenderson/spamfilter.html http://www.ijs.si/software/amavisd/#faq-spam http://www.dambrosioauto.com/razor_config.html

Integrated into Qmail

Can be integrated via qmail-scanner, an add-on to qmail. Info available at http://qmail-scanner.sourceforge.net/