On Jul 18, 2014, at 10:52 AM, John Levine <[email protected]> wrote:
>> Many years ago Joe Abley and I suggested to create a special name for
>> exactly this purpose
>> a name that was guaranteed to never exist in the DNS thus the first lookup
>> would always return NXDOMAIN thus the A+AAAA lookups would never take place.
>> http://tools.ietf.org/html/draft-jabley-sink-arpa-03
>
> While I don't think it's relevant for this application, isn't that
> what RFC 6761 defines "invalid" to be?
>
> R's,
> John
John,
I think it would be great to have this document use “no-mail.invalid.” as the
domain name rather
than “.” in the MX record i.e.
foo.bar.example MX 0 no-mail.invalid.
But this is just a question of preference and installed base.
Olafur
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