I configured email subsystem of my Centos 7 so it sends emails to outside world. Since then I started receiving about 10 emails every minutes from crond process. It is useless for me and want crond not to send any emails.
I tried to set
in /etc/crontab and in /etc/crontab.d (there's no more MAILTO=root in crontab related files) but the emails are still coming. I restarted crond service and later I restarted whole system. Nothing helps so far.