[Dovecot] LMTP proxying strategy with multiple recipient delivery

[Timo Sirainen]

On Thu, 2010-09-09 at 07:46 +0200, Luca Palazzo wrote:
> how does Dovecot act when an MTA tries to deliver a multiple recipient 
> message to a LMTP proxied system?

It also tries to forward the same message with one DATA and multiple
RCPT TOs.

> I use lmtp_destination_recipient_limit = 1 setting in postfix to avoid 
> multiple recipient delivery. Is it right?

Shouldn't be necessary. It's been tested to work with multiple
recipients, but bugs are of course still possible.

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

Probably.