Dirk,

On Wed, Sep 02, 2015 at 08:27:42PM +0100, djk wrote:

Is there anyway of replicating between more than one other instance of Dovecot. I have bidirectional replication working successfully and it seems to be reliable. I would like to replicate from one or more of these instances to one other. Is this possible?

I've asked the same question a few months ago and was looking at having multiple mail_replicas or using round robin DNS for the mail_replica.

Here's how I "solved" it:

Server A, B, C

A -> B on A set mail_replica = B Mail arrives at A, syncs to B

B -> C on B set mail_replica = C Mail arrives at B, syncs to C

C -> A on C set mail_replica = A Mail arrives at C, syncs to A

The more you add the higher the delays. Not the best solution but it works.

Timo please add multiple mail_replicas and maybe priorities for high latency links.

HTH

B.