I've adapted the recommendations in the Procmail Quick Start for naming maildirs and sorting into those maildirs with procmail. I use muttrc's fcc-hook commands to organize my replies into appropriate maildirs, and have mutt sort by thread. I find this approach provides ready access to all correspondence related to, eg, a particular client or subject or list. I use the gbuffy biff to display new message status for each maildir on my desktop.
All my maildirs are under ~/Mail, and all mail config files (abook, gbuffy, procmail, etc) under ~/Mailstuff (with softlinks from ~). Finally, to make the transition to mutt easier, I set up softlinks from my old mozilla mboxes under ~/MAIL so I can read 'em conveniently from mutt. HTH. -- Mark Johnson [EMAIL PROTECTED]