I recently configured postfix and stopped sendmail.
I am now getting Delivery Status Notification (Failure)messages to my home email every 30 minutes. First thought was a cron job. Checked it and sure enough. Commented the line out, but still getting them ever 30 minutes.
[root@vps ~]# crontab -e
# 30 * * * * /etc/init.d/minecraft backup
Is there another crontab? Do I need to flush this one after making a change or restart some service?