TSV should do it for you. Been there done that.

The post with comments and votes is here: https://news.ycombinator.com/item?id=43464068

More points and comments here: https://news.ycombinator.com/item?id=43406702

Agreed, most of email servers and services are broken per RFC. I've blogged about this over and over again.

My servers are all finally up and running again.

Technically it's just 128 bits, it doesn't matter how you represent it. I've written this IPv4ES solution, which allows you to use 128 bit addresses using IPv4 format.

https://www.sami-lehtinen.net/blog/ipv4es-the-perfect-soluti...

More comments here: https://news.ycombinator.com/item?id=39066956

Data over pure DNS is trivial. A simple demo site for anyone to try it out. https://dnskv.com $ dig txt quad9.dnskv.com

Outlook and Thunderbird both handle RSS feeds directly and work as reader.

I guess you guys could find this also interesting: https://infosec.exchange/@rdpsnitch