Poliman - Serwis:
> 2018-11-13 18:24 GMT+01:00 Viktor Dukhovni <postfix-us...@dukhovni.org>:
>
> > > On Nov 13, 2018, at 11:48 AM, Wietse Venema <wie...@porcupine.org>
> > wrote:
> > >
> > >> It's colonel.com.pl. Please check. I don't see anywhere MX's IP as A
> > record
> > >> in dns zone.
> > >
> > > You have both A and MX records for colonel.com.pl. Some SMTP systems
> > > may try to send email using the A record, if those SMTP systems are
> > > borked and if their DNS resolver is borked.
> >
> > In other words, nothing to worry about. There's no need to worry about
> > such broken systems in practice. Real MTAs don't get this wrong (though
> > perhaps what I'm saying is that if there are some MTAs that get this wrong,
> > they are garbage that deserves to be ignored).
> >
> > --
> > Viktor.
> >
> > [1] https://en.wikipedia.org/wiki/Infinite_monkey_theorem
>
>
> Ok, thank you guys for answers and advices. Appreciate!
You man still want to turn off the SMTP listener on colonel.com.pl,
because it will never receive legitimate email.
Wietse
