You need to use director, shared storage (such as NFS) and three nodes.
Aki
> On 20/04/2021 13:44 Miro Igov <miro.igov at gmail.com> wrote:
>
>
> Is there any workaround for 3?
>
> -----Original Message-----
> From: Aki Tuomi <aki.tuomi at open-xchange.com>
> Sent: Tuesday, April 20, 2021 13:41
> To: Dovecot Mailing List <dovecot at dovecot.org>; Miro Igov
<miro.igov at gmail.com>
> Subject: Re: Replication between three servers
>
>
> > On 20/04/2021 13:26 Miro Igov <miro.igov at gmail.com> wrote:
> >
> >
> > Hello,
> > I have dovecot replication working fine between 2 servers with LDA
configured to sync mail coming from Postfix.
> > These 2 servers are used in master/slave mode ? only the one server is
used by IMAP clients and the second server is just a backup in case of failure.
> > Second server is also MX backup and it happens that incoming mails
come from it via Postfix and get synchronized with the first server.
> >
> > I would like to include third server as backup. How could be done
while mail_replica accepts only one host?
>
> Replication is supported only between two hosts.
>
> Aki