[Dovecot] LMTP proxying strategy with multiple recipient delivery

Hi Timo and All, how does Dovecot act when an MTA tries to deliver a multiple recipient message to a LMTP proxied system?

Does it uses server affinity table for each recipient? I use lmtp_destination_recipient_limit = 1 setting in postfix to avoid multiple recipient delivery. Is it right?

I use lmtp_destination_concurrency_limit = 1 too, but i think that it's useless or, maybe, it can make performance worst.

Luca