> On May 19, 2017, at 10:02 AM, richard lucassen <mailingli...@lucassen.org>
> wrote:
>
> Ah, that might be the issue then, when I leave these parameters
> set to their defaults, it would mean that the maximum Postfix will send
> at once is 20 mails containing 50 recipients?
>
> So, according to you I should add:
>
> smtp_destination_concurrency_limit = 1
That's too fragile, at least without further tuning. With this,
when any connection fails the destination concurrency is reduced
to 0, and the destination is immediately throttled.
If you don't send much mail, and latency is acceptable, you could
start going from 20 down 10 or 5. Anything much lower and you
need to start tuning the advanced feedback controls...
Try and get whitelisted by outlook.com, that's better than taking
evasive countermeasures.
--
Viktor.
