dovecot to auto delete old trash

I've search long and hard and have only found threads that end with no solution... maybe I'm missing something, but it seems like a lot of people are asking and not finding solutions.

long story short, i'm trying to find a plugin or setting for cPanel at the root level that'll automatically delete items in trash folders older than X days old for Dovecot.

Does anyone have any input/insight on this action? I'd be able to save a TON of space if I could find this solution.

I found on Dovecot's site plugins/expire, but I don't have enough knowledge to be able to follow all of the steps and feel comfortable about the safety of my client's emails.
http://wiki2.dovecot.org/Plugins/Expire?highlight=%28empty%29%7C%28trash%29


thanks in advance!
-shannon