Disable mailing in cron globaly

Solution 1:

according to the man page can disable cron mail by adding -m off to the daemon args

   -m     This option allows you to specify a shell command to use for sending Cron mail  output  instead  of
          using  sendmail(8)  This command must accept a fully formatted mail message (with headers) on stan‐
          dard input and send it as a mail message to the recipients specified in the mail headers.  Specify‐
          ing the string off (i.e., crond -m off) will disable the sending of mail.