Hello, Pleas explain me about option initial_destination_concurrency. Default value of initial_destination_concurrency is 5. Example: Queue has 2000 emails to domain example.com. These emails not sent, because mail server example.com said: 421 Ratelimit exceeded for <ip address my server> When postfix trying send these emails, part sending normal, but big part don't send, because ratelimit exceeded again. Because of the permanent mailing, after 5 minutes, queue updated with new email to this domain.Vicious circle. Please advice, what of best value for option initial_destination_concurrency do I need? Thank you.
-- Kirill.
