Mac mail mail from cron
You get mail from cron whenever a cron command fails. In such cases you can use

crontab -l


to see which commands cron executes. From there you have two options


Run EDITOR=nano crontab -e to edit your crontab and remove the offending line
Fix the error in the script (/Users/sandeep/Library/cootie.pl/cootie.pl in your case)