MAILTO was set blank deliberately so that it doesn't spam you with emails every 20 minutes.
There for we now redirect the output to log file like this #7,27,47 * * * * root [ -x /sbin/burp ] && /sbin/burp -a t >/var/log/burp-client 2>&1 And remove the mailto. And add a logrotate for that file: /var/log/burp-client { daily missingok rotate 7 compress notifempty }