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

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