To get rid of the "bayes: synced databases from journal" emails reported in comment 2, try this patch to /usr/bin/sa-learn. It turns off verbose mode (forced on by --sync) which is what causes the output.
** Attachment added: "Patch to turn off verbose mode when "sa-learn --sync" is run" http://launchpadlibrarian.net/37664292/sa-learn.diff -- amavisd-new + spamassassin: cronjob spams root user https://bugs.launchpad.net/bugs/165184 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to amavisd-new in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs