doveadm sync issues (revised)

[Sami Ketola]

> On 9 May 2019, at 23.47, Sven Strickroth via dovecot <dovecot at dovecot.org> wrote:
> 
> Hi,
> 
> I'm experiencing serious issues using doveadm sync; mails are not
> replicating and/or mails are duplicating. I wanted to use this for
> migrating external mailboxes to my server (in order to overcome the time
> when some servers/clients still use the old server and some already my
> server, as described on <https://wiki2.dovecot.org/Tools/Doveadm/Sync>).

Use proxy for that. 

> 
> Now send two messages to remote at DOMAIN.TLD (Subjects Test3 and Test4)
> and two messages to local at DOMAIN.TLD (Subjects Test5 and Test6).
> 
> Run sync:
> $ doveadm -o imapc_user="remote at DOMAIN.TLD" -o imapc_password="PW" -o
> imapc_host="localhost" sync -R -u local at DOMAIN.TLD imapc:

imapc does not support two-way sync. You need to use doveadm protocol for that.

Sami