How to set up CRON error notifications on Ubuntu 12.04 by email?

Question

postfix

I set the line [email protected] in /etc/crontab, messages are periodically dropped to the mail, however, the postfix queue contains a bunch of forwarded messages from [email protected] to [email protected], in which it is written about the impossibility of delivering messages and a bunch of forwarding these messages .
Tell me where you can set the setting for cron and where to set a single email for the server admin?

Answer 1

https://debian.pro/1128