Outgoing spam alert cron script

gistfile1.sh

#!/usr/bin/env bash

HOURLY_THRESHOLD=200

total=$(cat /var/log/mail.log | sma -q -d -D 00,59 2>&1 | grep Total | head -1 | awk '{print $4}')

[ -z $total ] && total=0

if [ $total -gt $HOURLY_THRESHOLD ]; then
        hostname=$(hostname -f)
        cat /var/log/mail.log | sma -q -d -D 00,59 2>&1 | grep -i -A13 'top envelope senders' | mutt -e "set content_type=text/plain" -s "More than ${HOURLY_THRESHOLD} hourly outgoing mails in ${hostname}" me@example.com 2>&1 > /dev/null
fi