proxy dual server setup clarification

[Sami Ketola]

> On 12 Nov 2019, at 16.03, Marc Roos via dovecot <dovecot at dovecot.org> wrote:
> 
> 
> 
> 
> I want to migrate mail users to a new environment. 
> 
> If I setup a new server next to the old server, and enable proxy on 
> both. Is this then enough to migrate user by user with the passdb 
> host=newsvr option to the new environment?
> 
> Eg. I do not need to configure a director setup? 
> I only need to enable proxy for imap and lmtp on both servers? (messages 
> on the oldsvr will be proxied to the newsvr?)


You need just one proxy where the user session is authenticated and then
 forwarded to either backend depending on the host value. You don't need to
"enable proxy" on any backend or use director.

Sami