The word "only" is doing a lot of heavy lifting in your sentence, but yes I think that's what this thread is requesting. Maybe subsumed in your "extend ACME and CA/B" is that it'd take a lot of effort to get CAs on board. And I don't see commercial CAs getting excited about something unless they could charge a lot for it. And non-profit CAs like Let's Encrypt have enough on their plates just trying to keep HTTPS going. All of which is why I was suggesting someone would need to put together so...| Let's Encrypt Community Support
Internet mail determines the address of a receiving server through the DNS, first by looking for an MX record and then by looking for an A/AAAA record as a fallback. Unfortunately, this means that the A/AAAA record is taken to be mail server address even when that address does not accept mail. The No Service MX RR, informally called "null MX", formalizes the existing mechanism by which a domain announces that it accepts no mail, without having to provide a mail server; this permits significan...| IETF Datatracker
The Extensible Messaging and Presence Protocol (XMPP) is an application profile of the Extensible Markup Language (XML) that enables the near-real-time exchange of structured yet extensible data between any two or more network entities. This document defines XMPP's core protocol methods: setup and teardown of XML streams, channel encryption, authentication, error handling, and communication primitives for messaging, network availability ("presence"), and request-response interactions. This do...| IETF Datatracker
This document describes a DNS RR which specifies the location of the server(s) for a specific protocol and domain. [STANDARDS-TRACK]| IETF Datatracker
Module ngx_stream_upstream_module| nginx.org
weight=number| nginx.org
Just how many weird Resource Records can you stuff into a zone file? And what do these weird RRs actually return?| www.netmeister.org