Scratch that. I hadn't RTFMed the README.Debian. I didn't understand that I was supposed to uncomment the 'bypass'_*_checks in /etc/amavis/conf.d/15-content_filter_mode, so SpamAssassin wasn't even running. Working now.
Scratch that. I hadn't RTFMed the README.Debian. I didn't understand that I was supposed to uncomment the 'bypass'_*_checks in /etc/amavis/ conf.d/ 15-content_ filter_ mode, so SpamAssassin wasn't even running. Working now.