You could just do formail -s procmail -m procmailrc
(you can use the new -n option too to do it in parallel, or use -n anyway
if the archive has less than about 250 mail messages.)
Then, the procmailrc takes care of processing by Subject recipes. Just like
any normal procmailrc.
--
____________________________________________________________________________
Doug Hughes Engineering Network Services
System/Net Admin Auburn University
doug(_at_)eng(_dot_)auburn(_dot_)edu
Pro is to Con as progress is to congress