Weekly Cron Email Messages - How to Stop?

Running Ubuntu 13.04 for my server. In my mail server log I’m seeing the following message every week:

Dropped: root@admin &#8594; root@admin 'Cron <root@development> test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )' No MX for [admin]

That being said, I have no idea where this cron job is coming from that is generating an email message. Where can I look to track this down and ultimately put a stop to it?

Is there anything in /etc/cron.weekly folder?

Yes, three files:


However, when I edit the crontab (sudo crontab -e) there are no cron jobs listed. Could one of these files be causing the email message I’m seeing?

If you can’t tell, server administration is not my strong point. :wink:

Cannot say exactly, cause I don’t use Ubuntu and don’t know what inside those cron files. However, you can check their content and compare with the above log to find out.