[Dovecot] Imap 2 imap copy tool?

23 Jul 2003

      Hi List!
At the moment, our company is preparing to migrate from MS-Exchange to a
dovecot mail platform. Since there is no way to access the emails on the
file-store other than using webmail, pop or imap, I wanted to do this by
using an imap-to-imap copy tool.
I have found one that does the job (but POORLY), named migrate
(http://prdownloads.sourceforge.net/cyrus-utils/). Does anyone know some
other tool(s) for me I could have a look at?
My requirements for such software are:

it should use a username;password list to do the migration (20k+ users)
it should be able to do imap to imap copy, or imap to maildir with a
flexible path
it should copy all the folders too, except the "Public Folders" from
exchange.
it has to be able to "ignore" unknown flags from the exchange imap server
(\Recent).

What I would love the software to have (and what imapmigrate lacks):

Folder and message syncing (to be able to keep the mailbox in sync)
detailed errors if something goes wrong, not too much fuss over accounts
that DO get copied cleanly
fast tool? :)

Thank you for your time!
Kind regards,
Maikel Verheijen.