Wietse Venema:
> Rafael Azevedo - IAGENTE:
> > I've added this into my main.cf:
> >
> > slow_destination_concurrency_failed_cohort_limit = 5
>
> This stops deliveries after 5 ****COHORT**** failures.
>
> > I mean, if it is trying to deliver to xyz.com and it fails 5 times,
>
> Yes, but you configured Postfix to stop after 5 ****COHORT**** failures.
>
> For more information about ****COHORT**** failures and other parameters:
>
> http://www.postfix.org/SCHEDULER_README.html
In short, Postfix ONLY adjusts concurrency after connect/handshake
failure, NEVER EVER for a 4XX reply to RCPT TO.
Wietse
