/etc/pf.conf
table <spamd> persist table <spamd-white> persist rdr pass on $ext_if inet proto tcp from <spamd> to \ { $ext_if, $int_if:network } port smtp -> 127.0.0.1 port 8025 rdr pass on $ext_if inet proto tcp from !<spamd-white> to \ { $ext_if, $int_if:network } port smtp -> 127.0.0.1 port 8025
Essential data in the spamd and spamd-white tables