Honestly, that was a bit of a wise crack. What I am doing with those two things (plus a number of other that are required these days, notably for DKIM) is running my own mail server.
Fair warning: Doing that costs money, time and effort, and messing it up can lead to... interesting results. (You usually don't want "interesting" for something as fundamental as your email.)
If you are still interested, join us in [email protected]. (Still figuring out how to properly link to a community on lemmy. In the meantime, look for it under "Communitys".)