Viktor Dukhovni via Postfix-users:
> On Tue, Oct 03, 2023 at 06:29:08PM -0400, Wietse Venema via Postfix-users
> wrote:
>
> > > My first wild guess is setting in_flow_delay to a higher value might
> > > help. Note this may be completely inappropriate for your specific
> > > application.
> > > http://www.postfix.org/postconf.5.html#in_flow_delay
> >
> > That, and reducinig the number of smtpd processes if the sender makes
> > parallel connections.
>
> When senders chronically exceed the available output bandwidth, rate
> limits don't help. They just create massive blockages upstream, that
> will eventually cause large problems.
>
> The only solution is to reduce the actual volume of messages originated,
> or to be able to identify inadvertent floods, and park most of the
> flood in a short-term quarantine (to be deleted after a sanity check).
>
> The job is to identify the root cause, and adress that.
The mail comes from internal IT apps. Passive throttling in Postfix
(process limit, in flow delay) are options an option to slow down
the flow without rejecting mail outright, as with anvil rate limits.
Wietse
_______________________________________________
Postfix-users mailing list -- postfix-users@postfix.org
To unsubscribe send an email to postfix-users-le...@postfix.org
