Try just putting "MAILTO:email@example.com" (without quotes) into your cront tab, and see if that works. So, in more detail you'd:
Connect via SSH / Telnet
type: crontab -r
press Ctrl and O at the same time
press Ctrl and X at the same time
If you still get an error with that as your only thing in the crontab, then you should contact support becuase something not set up right.
If you don't get an error, then there's something wrong with your command, and perhaps you can post it here to see if someone knows what's wrong.