Today Microsoft has committed to DANE support for O365, initially outbound by the end of 2020, and later inbound by the end of 2021:

https://techcommunity.microsoft.com/t5/exchange-team-blog/support-of-dane-and-dnssec-in-office-365-exchange-online/ba-p/1275494

This">https://techcommunity.microsoft.com/t5/exchan... is a significant milestone in DANE adoption, three cheers for Microsoft.https://abs.twimg.com/emoji/v2/... draggable="false" alt="🥳" title="Partying face" aria-label="Emoji: Partying face">

I posted a comment:

#M28072">https://techcommunity.microsoft.com/t5/exchange-team-blog/support-of-dane-and-dnssec-in-office-365-exchange-online/bc-p/1286587/highlight/true #M28072

Any">https://techcommunity.microsoft.com/t5/exchan... providers who still think that broken denial of existence does not matter need to get their act together and fix their systems... Ditto for neglected incorrect TLSA RRs.

I posted a longer note to the Postfix and Exim user lists:

http://postfix.1071664.n5.nabble.com/Some-news-on-SMTP-DANE-TLS-td105321.html">https://postfix.1071664.n5.nabble.com/Some-news...

To put the timescale for Internet infrastructure changes in perspective, I started work on DANE for SMTP in the spring of 2013: https://tools.ietf.org/html/draft-dukhovni-smtp-opportunistic-tls-00,">https://tools.ietf.org/html/draf... with RFC7672 published in Oct 2015.
After seven years, do I get Rachel, Leah or both? (And which is which?)