Recommended tool for migrating IMAP servers

[Sami Ketola]

> On 5 Dec 2017, at 10.20, Paolo <tech-lists at fcr.re.it> wrote:
> 
> Il 04/12/2017 17:37, Michael Slusarz ha scritto:
>>> I think Davide was asking about dsync. If so, the answer is no: dsync
>>> works only when both servers are Dovecot and needs some additional
>>> configuration to work through the network (see
>>> https://wiki2.dovecot.org/Replication).
>> This is entirely incorrect.  The source platform for dsync can be ANY IMAP/POP server.
>> 
>> The recommended tool for migrating into Dovecot is dsync.  You don't need any other tool, and other tools aren't going to preserve state so they are pretty much worthless for a real-world in-place migration.
> Entirely?! At most half incorrect. My apologies, I didn't know about the dsync's IMAP feature (I suppose it wasn't there from the beginning).
> This fact still remain: you can use dsync only when dovecot is involved.
> Even so (IMHO) the sentence "You don't need any other tool" is a bit too much. Who ever know all possible use cases in the world?
> Cheers
> Paolo

IMAPC storage driver has been part of dovecot since January 2011:

https://github.com/dovecot/core/commit/9fb018dea4e2073639249ea8a14ae27cab2c0aac <https://github.com/dovecot/core/commit/9fb018dea4e2073639249ea8a14ae27cab2c0aac>

Sami