Check qmail mesaagequeue status

1-qstat_cron_check

#!/bin/sh

MAIL_BIN=`command -v mail`
QMAIL_QUEUE_SIZE=`/var/qmail/bin/qmail-qstat | grep 'messages in queue:' | awk '{print $NF}'`

function send_notification_mail() {
  $MAIL_BIN -s "WARNING: MAILQ critical on $HOSTNAME - size $QMAIL_QUEUE_SIZE" "todesadmin@example.tdl" <<EOF
Messages in queue: $QMAIL_QUEUE_SIZE                                                                                                                     
EOF
}

if [ "$QMAIL_QUEUE_SIZE" -gt "100" ]; then
  send_notification_mail
fi

exit 0

2-crontab

*/10    *       *       *       *       /usr/local/bin/qstat_cron_check 1> /dev/null