Possible iMAP server

[Richard Pieri]

Maildir.  There's almost never a good reason these days to use mbox.

Dovecot does not make subdirectories internally.  Assuming that "~/Maildir" is your mail home, the mail folder "Foo" is "~/Maildir/Foo" and "Foo/bar" is "~/Maildir/Foo.Bar".  Regardless, Dovecot presents Foo and Foo/Bar as parent and child to the IMAP client.

--Rich P.