Wietse Venema:
> Deniss:
> > I looking for a way to speed up delivery for specified sender's domain
> > when incoming queue is overloaded.
>
> Wietse
> > When the road to the airport is clogged, everyone has to wait.
> > [using] a different queue is like building a different road.
> > Then, one road will hopefully not be congested.
>
> Deniss:
> > well, I want fast lane for certain domain indeed.
>
> Then you need that second queue. Use smtp_fallback_relay
> to move 'slow' mail out of the main queue.
If you must use a single queue, then you will have to increase the
active queue size so that it can absorb the full content of a peak.
This will increase the memory usage by the queue manager.
The default is:
qmgr_message_active_limit = 20000
How large you can go is system-dependent. Try 10x.
Second, adding a dedicated master.cf transport for the domain will
reduce scheduling competition.
Wietse
