OpenDKIM Postfix & Centos 5.5

Post-installation setup

Create a Linux user for OpenDKIM, then make some directories to store your keys and config files in.

# useradd -s /sbin/nologin -b /var/run/opendkim opendkim-milt
# mkdir /etc/mail/dkim
# mkdir /etc/mail/dkim/keys
# chown -R opendkim-milt:opendkim-milt /etc/mail/dkim
# chmod -R go-wrx /etc/mail/dkim/keys

Create a start-up script and place it inside /etc/init.d/ so OpenDKIM can startup on boot and you can start/stop it easily. There is a template script in /usr/share/doc/initscripts-8.45.30/sysvinitfiles and here is a working example:

#!/bin/bash
#
# opendkim    Start and stop opendkim.

# chkconfig: - 41 61
# description: opendkim
# processname: opendkim
# pidfile: /var/run/opendkim/dkim-milter.pid

### BEGIN INIT INFO
# Provides: opendkim
# Required-Start: opendkim
# Required-Stop: opendkim
# Short-Description: Start and stop OpenDKIM
# Description: DKIM milter
### END INIT INFO

# Adapted from Andrew Colin Kissa's <topdog-software[dot]com> script for dkim-milter - 28-05-2009

. /etc/rc.d/init.d/functions

DAEMON=/usr/local/sbin/opendkim
RETVAL=0
PID_FILE=/var/run/opendkim/dkim-milter.pid

start() {
 echo -n $"Starting DKIM milter: "
 daemon $DAEMON -x /etc/opendkim.conf
 RETVAL=$?
 [ $RETVAL -eq 0 ] && touch /var/lock/subsys/opendkim
 echo
 return $RETVAL
}

stop() {
 echo -n $"Stopping DKIM milter: "
 killproc -p $PID_FILE
 RETVAL=$?
 echo
 [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/opendkim
 return $RETVAL
}

restart() {
 stop
 start
}

case "$1" in
 start)
 start
 ;;
 stop)
 stop
 ;;
 restart)
 restart
 ;;
 status)
 status -p $PID_FILE
 ;;
 condrestart)
 [ -f /var/lock/subsys/opendkim ] && restart || :
 ;;
 *)
 echo $"Usage: $0 {start|stop|status|reload|restart|condrestart}"
 exit 1
esac

exit $?

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