cpanel cron mail output
The following is an example of what this would look like to silence both STDOUT (Regular output) and STDERR (Errors from the script) so that you never get emails from that script:
15 */2 * * * /path/to/your/script >/dev/null 2>&1
The following is an example of silencing only STDOUT so that you only get error emails:
15 */2 * * * /path/to/your/script >/dev/null
The following is an example of silencing only STDERR so that you only get non-error emails:
15 */2 * * * /path/to/your/script 2>/dev/null