On Tue, Nov 13, 2018 at 05:31:13PM +0100, Poliman - Serwis wrote:
> It's colonel.com.pl. Please check. I don't see anywhere MX's IP as A record
> in dns zone.
You missed that the point is called "There should not be a mail
exchanger set up on naked domain name."
Don't run an externally reachable SMTP server on colonel.com.pl.
| % nc colonel.com.pl 25
| 220 s1.poliman.net ESMTP Postfix (Ubuntu)
Bastian
--
Men will always be men -- no matter where they are.
-- Harry Mudd, "Mudd's Women", stardate 1329.8
