On 10 Jun 2018, at 17:26, Al Iverson via mailop wrote:
example.net IN MX 0 .
Nice. It's been listed in a few best practice documents as well as
RFC 7505 for more than a few years. Good to see it getting some
traction.
I cry a little inside every time I see a null MX, think of the lost
opportunity to be handling it as a spamtrap domain instead.
It's not a lost opportunity, it's aging. A null MX is like a charred
white oak barrel for a mail-dead domain.
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