[Dovecot] 1 Dovecot proxy to 2 real IMAP servers

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