Stop crontab from sending email

If you have script that echo a string and if the “mail” program is enabled and configured crontab will email the output. To disable add ‘>/dev/null 2>&1’ at the end of script. This will capture all of the commands output.

30 * * * * notBraiamsBackup.sh >/dev/null 2>&1

sources:
https://unix.stackexchange.com/questions/84335/stop-cron-sending-mail-for-backup-script#answer-84340