http://lpoaj76nfopd5lpinbskyqtroppamrzhhay3g4vvjm75st6ger34lbyd.onion/posts/2020/08/email-sucks.html
Now, this rant probably would not have appeared here if said RFC regarding the reverse DNS records did not exist, and would instead have been replaced by a post on how to host a mailserver. However, because it exists, it renders me unable to host a mailserver myself, so instead I decided to complain on the weaknesses of the protocol, which is kind of like Facebook - you only use it because everyone else uses it, not because it is great, which is also known as the network effect.