I set up a cronjob a long time ago that now doesn't exist. Whenever I open up Terminal, it now says "You have mail". I have something like 100 messages that all say the same thing. How do I mass delete all of the messages?
I know this post is old, but I want to contribute with an answer.
to delete your mail messages do the following:
sudo rm /var/mail/[user]
And in order to the question, I suggest you do the following to each crontab you do not want to send an email notification (this way your mail will not have mails)
* * * * * /path/to/script.sh > /dev/null 2>&1
* * * * * command > /dev/null 2>&1
I want to reinforce clearly one point how command [delete *],[q] really helped me out in this case.
I set a cron job to run like every day in 2018 (if I recall correctly) and forgot about it.
Now I realized to check and I discovered 3000 messages in my mailbox! Note to others that a quick edit can pile up reports rapidly.