[Dovecot] Mixed Courier POP3 and Dovecot IMAP environment

Hi,

Currently we support Courier POP and IMAP for all our users (users can use IMAP as well as POP at the same time).

We are thinking about moving to Dovecot; but first moving away from Courier IMAP to Dovecot IMAP (and maybe later also move to Dovecot POP).

This would create a mixed environment; after some research I have the following questions.

To not break POP3 Courier and still be able to use Dovecot IMAP:

•      I have to use the namespace prefix in the dovecot.conf file:

  I read this in the wiki.

•      "Patch" the source so Dovecot IMAP will look for/use

  'courierimapuiddb' instead of 'dovecot-uidlist': otherwise I guess POP3 and IMAP users will have different UID files, right? Is this smart or will this still break the UID file?

•      "Patch" the source so Dovecot IMAP will look for/use

  'courierimapsubscribed' instead of 'subscriptions' of should I just go with the renaming of the files?

I'm thinking about patching so the transition can be as transparent as possible: Also if anything might go wrong in production I want to be able to switch back to the 'old' Courier IMAP (without renaming files etc.)

Any thoughts on this?

Cheers,

Jan