PF and Spamd

OpenBSD's pf takes care of directing traffic
Tables are used to decide if something is blacklisted/whitelisted/greylisted
spamd NEVER accepts or routes mail
Whitelisted hosts NEVER see spamd
NO changes need be made to the existing MTA configuration
Logging MTA traffic lets spamlogd timestamp whitelisted hosts

table <spamd> persist
table <spamd-white> persist

rdr pass inet proto tcp from <spamd> to any port smtp -> 127.0.0.1 port 8025
rdr pass inet proto tcp from !<spamd-white> to any port smtp -> 127.0.0.1 port 8025