[Dovecot] 1 Dovecot proxy to 2 real IMAP servers

[Proskurin Kirill]

Hello all.

I have 2 Dovecot IMAP servers with different mailboxes. What serves 
different email domains.

I want to add one Dovecot Proxy server and make him understand based on 
user domain - were it need to transfer a connection.
I use LDAP auth based on "mail" attribute.

It is possible?

P.S. Proxy documentation at dovecot.org not help at all and seems to not 
complited. :-(

-- 
Best regards,
Proskurin Kirill