proxy dual server setup clarification

Marc Roos M.Roos at
Tue Nov 12 17:03:34 EET 2019

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?)

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