Re: Newbie Question: Is anyone actually using the Null MX (RFC 7505)?

["John Levine" <johnl () iecc com>]

In article <Pine.LNX.4.64.2102262007230.25288@cube> you write:
> Hmm right... Somehow I tought that having that special Null MX
> will silently discard message... I dont know why...
>
> So, RFC 7505 is pretty much even pointless in my opinion.
> You have to do more.. to pretty much achieve the same..
> Its just easier to not having MX on subdomains that does not serve
> as email destinations.. Less records in DNS..

Please reread RFC 7505 section 4.

I presume you are aware that SMTP falls back to A records only if there
is no MX record.  If there is any MX record, null or otherwise, mail
clients don't look for an A or AAAA.

R's,
John