I keep my mail in two separate hierarchies, all incoming mail is delivered (via a perl script which does procmail sort of things) to a series of maildir mailboxes in ~/Mail and ~/Mail/lists.
All the mail that I save for any reason is saved in mbox format below ~/savedMail. I have "set mbox_type=mbox" in my muttrc, mutt recognises the incoming mail in maildir format without problems. However if I 'c' directly to one of the maildir mailboxes, entering its full path then I get to see the following:- -> ../ Oct 04 11:11 4.0K cur/ Oct 04 16:36 0.1K new/ Oct 04 16:36 0.1K tmp/ Oct 04 15:34 0.1K I.e. mutt hasn't recognised that it's a maildir. If I navigate there via the directory above (or even go to .. and then back from the abve) mutt recognises it correctly as a maildir. -- Chris Green