[dns-operations] TLD(s) for private use
ietf-dane at dukhovni.org
Wed Sep 6 18:55:44 UTC 2017
> On Sep 6, 2017, at 5:28 AM, James Stevens <James.Stevens at jrcs.co.uk> wrote:
> Or is the correct procedure to be using something like "data.invalid."?
I've been using the "invalid" and "localhost" TLDs for various internal purposes for over a decade.
* address.invalid -- decorates domain-less bare-localpart addresses from external senders
* discard.invalid -- blackhole rewrite domain
* example.com.localhost -- Special-use names (typically MX records) served by the local
resolver, visible on just the one host (often a border MTA).
I try to make these reasonably self descriptive, to avoid any confusion. This has
worked well. In your case, "externally.invalid" could be a viable parent domain
for private-use, but a real domain is cheap enough, and a better choice in most
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