I’ve been using Zoho for email on my domain. My residential service blocks port 25 so being actually self hosted wasn’t going to work. I had rented a cheap VPS for $4/mo to run it on, thinking I’d have other uses for it. Eventually I just went to the Zoho free email hosting with my domain. It’s been fine for years and I’m reasonably sure it has a catch-all as well.

I gave up on finding a tracker for STLs. Almost none and no available invites. I have, however, found a wealth of them on Telegram and it’s not hard to find. There will be lots of ads for crypto subscription channels. There is maybe one that’s actually any good and/or not a scam. There is a boatload of scams tho. There are also channels that focus on group buys. Do your research but those are also important because there are many artists that need support to keep up their work.

Also watch out for sites selling STLs for stupidly cheap with vague or non existent attribution. None of your money will go to the artist