On 2017.08.23. 15:28, Wietse Venema wrote: > Deniss: >> Hello, >> >> I looking for a way to speed up delivery for specified sender's domain >> when incoming queue is overloaded. > > When the road to the airport is clogged, everyone has to wait.
> Yes, using a different queue is like building a different road. > Then, one road will hopefully not be congested. > well, I want fast lane for certain domain indeed. I looking for a way to implement this with no dedicated postfix instance. I feel there is a way with restriction classes + dedicated qmgr or smtp service(s) let me explain my setup: I have postfix as frontend to absorb incoming messages as fast as possible. Then I have slow smtp backend. Postfix limits delivery to backend with smtp_destination_concurrency_limit = 2 This works pretty fine allowing to not oveload backend on peaks - messages become queued at frontend and delivered with some delay to backend. But now I want to deliver certain domain with no delay. Is it possible to catch the sender's domain with restriction classes of postfix and pass a message to dedicated smtp process where smtp_destination_concurrency_limit is not limited ? May be there is way to force qmgr to select messages from the domain in first place when it takes messages from queue for delivery ? Best, Deniss
