[Dovecot] Retention Policy Feature(?)

[Ted Strzalkowski]

I am currently using dovecot 0.99.14p1 on OpenBSD 3.8, mbox format,
procmail+sendmail MTA.  I subscribe to quite a few mailing lists and
currently have procmail sorting mail into the proper mboxes.  I was hoping
there would be some sort of retention policy feature built in to dovecot.  I
want to delete mail more than X days old from X folders.  I have combed the
documentation, list archives, and google.  Is this a feature? If so, where
can I find more information on it.  If this isn't a feature, is it in the
works or is it left out to keep things "slim line"?

Ted Strzalkowski