If you don’t mind having email go through Gmail etc, then you might not want to full host, but just run a local IMAP server. There are some pop to SMTP solutions you can use to pull your emails (fetchmail.) you can then use your account as an outbound relay. Keep in mind you’ll only be able to set this up for a single account if you use something like Gmail.
If you buy a business product like workspace or m365, you should be able to setup relay/hybrid connectors for multiple accounts.
Realistically early access launches are just launches. Some games get a boost and surge when they go 1.0, but the vast majority don’t. Using the ea tag may put more people off than the buggyness, and people forget about the game 3 years later when it hits 1.0. I think paradox knew about it and just decided it would reduce sales more then the bug reports would.
Don’t get me wrong I don’t think games with major bugs should be released as a 1.0 product if they are asking a high price. There are great games that started ea and became great, but it was a risk for them when they did that.