As of spampd-2.30-16, the software has been converted to systemd.

The PID file is no longer created, because spampd does not background itself.

To enable and start the service, use the usual:

systemctl enable spampd.service
systemctl start spampd.service

The environment file, /etc/sysconfig/spampd, now has a slighly different
format. Instead of using options, use SPAMPD_OPTIONS. For instance:

SPAMPD_OPTIONS="--host=127.0.0.1:10026 --relayhost=127.0.0.1:10027"