I _love_ playing around with (and sometimes actually) self-hosting stuff. But email is something that I will HAPPILY pay someone like FastMail or ProtonMail ~$5/mo to handle and avoid myself the hassle. It just works. I can add whatever subdomains/addresses/sending profiles/etc., and I don't ever have to think about data backups, blacklists, spam reputation, or any of the dozen other issues I've heard about since I became aware of how email hosting works in ~2006.

Kudos to those of you in this thread who live the dream, though (really).