On 21 Jan 2019, at 22.00, Marc Roos <M.Roos@f1-outsourcing.eu> wrote:

Thanks Sami, And I should allow access on the remote server via login_access_sockets? And the authenticated user via this connection is then testuser I presume?

No. It's the doveadm service that it's contacting:

service doveadm { service_count = 1000 inet_listener { port = 2425 } }

and passwords need to match on both servers:

doveadm_password = secret

Sami