On 18 Apr 2016, at 8:28, Michelle Sullivan wrote:
Petar Bogdanovic wrote:
On Mon, Apr 18, 2016 at 01:41:55PM +0300, Otto J. Makela wrote:
Would we actually miss any real emails if our mail server
started rejecting all emails from .top, .win and .xyz TLDs?
I don't think it's a good idea to reject any TLDs with open
registration.
BTW, Alphabet is at abc.xyz..
Also, what is the current consensus on rejecting messages
from "bare" IP addresses without a name in DNS?
Rather tempfail than reject. You never know if one of the parties
involved is having DNS issues.
(3) NXDOMAIN = No Records = Hard Fail
With the things I’ve learned over the last few years, I wouldn’t 5xx
in this case. There are scenarios where this happens due to
misconfiguration (or allowing domains to expire by mistake), 4xx is
always a safe choice,
Best regards
-lem
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