I was weary of self-hosting email myself too, didn't want to go down that rabbit hole. After some searching, I've landed on migadu.com. I just renewed the subscription after the first year, was 19$ a year for the micro plan, which is more than enough for my needs. Not sure why they use dollars though, as they are a Swiss company.

So far no problems, have ~10 of my domains hooked up for email.

The only downside I can spot is it's bring-your-own-domain, so take that into account.

I've been using Startmail recently. I really like that it lets you create multiple different permanent 'aliases' and can even create temporary aliases