spamd

I have the following information: posfix + dovecot + spamassisan , So: unix root@mail:~ # ps ax |grep spam 18914 - Ss 12:10.69 spamd (perl) 74489 - Ss 0:00.36 /usr/local/sbin/spamass-milter -f -p /var/run/spamass-milter.sock 80859 - I 0:01.79 spamd child (perl) 84587...

I've set up obspamd on one of my FreeBSD hosts in the past and used 'rdr' translation rules in pf.conf to achieve this, as per the documentation for the FreeBSD package. I'm now doing it again on a new host and refreshing my memory on how it's configured. OpenBSD's documentation for spamd...