I am so sad native replication has gone. It is the perfect HA solution
   because all others depend on HA-storage and that is far less easy to setup
   than this simple replication. So far, I haven't found a reasonable
   solution for small setups such as mine.
   I really would like to see it come back in some form, but only `live'
   (i.e. it doesn't matter which of the two servers you talk to)
   G

     On 4 Mar 2026, at 20:40, Marc Singer via dovecot <[email protected]>
     wrote:
       On 3/4/26 10:41, Aki Tuomi via dovecot wrote:

     On 04/03/2026 20:19 EET Paul Kudla via dovecot
     [1]<[1][email protected]> wrote:

     what you are trying to do is enable replication

     2.3 is supported it is my understanding this was removed in 2.4 (unless
     you buy a contract)

     Paul, replication is not available even with contract. There are some
     open source alternatives if you want to use replication, e.g. wormhole
     plugin.

       I tried a couple of the open-source replicators.  Neither worked and
       probably for different reasons.

     Marc, your problem is that you are trying to setup sync over IMAP. If
     you are attempting to do this for migration, see
     [2][2]https://doc.dovecot.org/2.4.2/core/admin/migration.html

       I'll work with those instructions.  Thanks.  Sometimes, the problem is
       knowing what this thing is called that one wants to do.

       Cheers

     If you are indeed trying to do bidirectional sync with tcps you need to
     configure, on both servers

     service doveadm {
        inet_listener 12345 {
          ssl = yes
        }
     }

     doveadm_password = foobar

     and then use

     doveadm sync  -R1 -u USER tcps:OLD_SERVER:12345

     Aki

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       Marc Oscar Singer
       Woollysoft
       Dial 817.1823.602.1+ from right to left.

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   Gerben Wierda ([11]LinkedIn)
   [12]R&A Enterprise Architecture (main site)
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