help on picking an IMAP server

[David Banning]

I have been using imap-uw for some time but now I would like to 
have an imap server that can have subfolders. Out with imap-uw..

I tried dovecot but I was unable to get it to create subfolders,
although it seems some say you can, may people are having problems
doing so, and I didn't like the fact that it changes the format of
the folders from the mbox standard.

So I tried cyrus-imap. It did allow me to create subfolders. Cyrus
however seems like it is a system-wide program. Where with imap-uw
and dovecot I could still keep my old non-imap mailboxes in tact
cyrus wants seemingly to control everything, doing away with /var/mail
and setting up it's own email format.

So I guess I'm hoping to get an imap-uw like imap, but one where I
can creat folders.

any suggestions?