Errata, changes, and other notes during the course of development.
Jail + break after processing
source per-site rules in /etc/mail/spamassassin/prefs
spamc.conf - up max message size from 500k to 1m
Custom sshd, dovecot, smtp, vsftpd
nsswitch.conf, add apnscpvwh to passwd
On high capacity servers, patch UW-IMAP with poll. Otherwise libc-client runs out of file descriptors.