I run a mail server on a typical Linux/Postfix/Amavisd/Dovecot stack and have been recently playing with sa-learn. More on that later. In the mean-time I thought I’d share a quickie bash command to remove old junk mail from all virtual users that I just spun up in a cron job:

find /var/mail/ -regextype posix-extended -regex '.*Junk/(cur|new)/.*' -ctime 14 -exec rm {} \;

Of note is the -regextype flag. Apparently, find uses emacs style regex parsing by default which doesn’t allow “or” groups. Ok, I’m really going to sleep now.