On Thursday 26 January 2012 04:31:20 Gedalya wrote: > I'm facing the need to migrate from a proprietary IMAP server to > Dovecot. The migration must be as smooth and transparent as possible.
Ignoring the migration of individual mailboxes addressed in other replies, I trust you've met Perdition - very useful for this sort of situation, http://horms.net/projects/perdition/ to provide an IMAP "Server" (actually proxy) that knows where the real mailboxes are located, and directs connections accordingly. That way you can migrate mailboxes one-by-one as you've migrated them, helpful to test a few mailboxes first without affecting the bulk of users' mailboxes atall. cheers, Andrew.