Roberto Giordani:
> Thank you for reply Noel,
> I've found some interesting info about smtp_connection_cache_destinations
> and I've added the IP of my relay.
>
> But to improve the interval between delivery and avoid a large of
> deferred mail what else do you think should I change in my conf?
Hello, I wrote Postfix and maybe you should listen to what I say.
I suggest that you fix the problem, namely, why commections are
timing out with your relay host.
Once you get rid of the timeouts, everything will move faster.
Reduce smtp_destination_concurrency_limit by a factor of 2 (and
execute "postfix reload"). Repeat this procedure until the timeouts
go away.
Wietse