> On May 1, 2018, at 12:50 PM, Fazzina, Angelo <angelo.fazz...@uconn.edu> wrote:
>
> Yes, I was guessing, must have be active and not incoming queue.
> Thanks for the explanation of what I was seeing.
I hope it is clear that the active queue size limits don't determine
the total number of messages Postfix can accept. Considerably more
mail might be sitting in "incoming" and "deferred".
On modern systems with lots of RAM you can also raise the active
queue limits from the default 20,000 to 100,000 or perhaps more.
Do it gradually and see how much memory qmgr(8) consumes.
More active queue space can help when most of the traffic is to
a small number of slow destinations, which can fill the active
queue and starve out other traffic.
--
Viktor.
