Hello, today I played a little bit with my Dovecot Imap server. I noticed a feature that allows Dovecot to store mails in gziped mboxes by using an Imap plugin (zlib_plugin). I frequently create archives of some large imap maildirs with archivemail, which stores mails in gziped mboxes. I can view and open thoses gziped mboxes via imap (no need for the compressed folders patch in mutt). The only problem is that mutt claims that thoses mboxes are read-only, which is not true . I tested it with Apple's mail programm and i can change flags, delete messages etc.
Regards, Florian. -- F Unglaub