Cloudflare email routing
Cloudflare email routing makes it trivial to stand up an email address on your custom domain. I wanted to set up
firstname.lastname@example.org (send me an email!) to forward to my personal email address, and it literally took ~3 minutes of button clicking.
I’m already a happy customer of Cloudflare’s domain registry, which doesn’t mark up domain prices and comes with all the expected stuff (e.g. SSL). Email routing doesn’t support replying from that custom address out of the box, but you can do other cool stuff like custom processing logic in a Cloudflare Worker and analytics.