2018-11-13 19:58 GMT+01:00 Wietse Venema <wie...@porcupine.org>: > 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 >
Thank you for answer. I suppose I don't understand properly. How could I do this if this domain has MX on Google? -- *Pozdrawiam / Best Regards* *Piotr Bracha*
