[Service]
PIDFile=/var/spool/postfix/var/run/opendkim/opendkim.pid
User=opendkim
Group=postfix
ExecStart=
ExecStart=/usr/sbin/opendkim -P /var/spool/postfix/var/run/opendkim/opendkim.pid -p local:/var/spool/postfix/var/run/opendkim/opendkim.sock