Question: How do I stop crontab from sending me emails after a cron job finishes?
Answer: In Linux the default setting for crontab is to send an email to the owner after a cron job finishes. An easy way to change this is to reroute those emails into nothingness, which in Linux is a directory called /dev/null.
Just append a pipe to it at the end of your command like so:
/usr/bin/command >/dev/null 2>&1
That will do the trick. You can enter it from the command line or through a control panel, if it supports cron jobs.