Karel:
> > On 2016-11-02 11:36, Wietse Venema wrote:
> >> NOQUEUE: reject: RCPT from unknown[x.x.x.x]: 450 4.7.1 Client host
> >> rejected: cannot find your hostname, [x.x.x.x]
> >
> > Note that this is a 450 status, because the name server did not reply.
> > A proper SMTP client will therefore try to deliver the email later.
>
> but looking in my logs, I see also 450 status when nameserver is
> reachable, but hostname could not be resolved (because it does not exist)
Please show actual concrete evidence, instead of spreading rumors.
Wietse
