[Dovecot] Best way to migrate versions and machines

[Donny Brooks]

We are looking to migrate from our current mail server running 
dovecot-1.2.11-3 to a new mail server running the latest dovecot 
(2.0.9?). So this would not only be a version change but also a machine 
change. We currently use Maildir for storing mail and would like to stay 
that way.

Has anyone preformed such a feat and it worked? Looking for any input.