Proper Way to Configure a Domain which never sends emails

[Barry Margolin]

In article <mailman.930.1566219505.711.bind-users at lists.isc.org>,
 Ignacio García <yo at ignasi.com> wrote:

> Hi there.
> 
> Thanks for your support. First message to the list, sorry if already 
> posted a similar question, but I haven't found mention anywhere.
> 
> I have to set up dns records for a domain just for a web site, for which 
> we will NEVER send emails (though we might receive some from old 
> customers), so I would like to announce somehow that emails sent from 
> this domain should always be disregarded. I was thinking of setting just 
> A and AAAA records for @ and www, NS records, MA records (for receiving) 
> and SPF with a record just consisting of v=spf1 -all  , not declaring an 
> A and MX records at all. I'm not sure at all this is a proper way of 
> declaring this. In fact, what I would like is to EXPLICITELY mention 
> somehow that we will never send emails from that domain. Could anybody 
> help me with this?

A common practice is to point the MX record to ".".

-- 
Barry Margolin
Arlington, MA