Zero issues since then. First time my emails got into spam but after unspamming, it worked.
Havent had issues. I use a cheap racknerd $12/year server so its way cheaper than proton or stuff and I have dozens of emails across family members.
Pay a bit more for a better reputation provider. Use a domain you've owned for a while. Set up all SPF, DKIM, and DMARC properly.
Or just pay fastmail to do it for you.
Some email providers don't like brand new domains, yes, but if a domain is brand new, nobody is going to immediately start using it for mission critical things. That's just common sense, although now I want to buy a domain to see how much of an issue this really is.
The cost and quality of a VPS means very little because if a VPS is on a network with a poor reputation, one can easily smarthost through a mail provider that has a good reputation.
Likewise, people can run servers at home, or they can colocate, or whatever, and don't have to run a VPS at all, although I think you're just generalizing and aren't suggesting that people can't use other servers.
I'm sure you'll have some problems if you start serving newsletters right away, but as a personal mail server, you don't really need to do anything.
I even fucked up the config at one point for a week, and all the mail just patiently waited on the senders mail server for mine to be up again. I really love email.
https://mako.cc/copyrighteous/google-has-most-of-my-email-be...