SMTPD II
Patterns in src, from
ALL
KNOWN|UNKNOWN
NS=
USER - in from - match in identd
Examples
deny:UNKNOWN:AL::ALL
deny:*.spamhaus.com *.junkmail.com:ALL:ALL
noto:ALL:ALL:*%*@*:551 Sorry %H (%I), I don't allow relaying to %T
noto:RBL.rbl.maps.vix.com:ALL:ALL:550 Mail from %I in MAPS RBL being blocked, see http%C//maps.vix.com/rbl/
Reference
man smtpd, smtpfwdd
Commented examples in /usr/share/smtpd