I've been thinking to move away from Gmail for a while now, what alternatives do you suggest?
If you do not like Fastmail, still get your own domain for emails.
I'm now considering switching to Fastmail or Tutanota.
Or even run my own mail server. I used to do that until a couple of years ago, but I eventually got frustrated by all the dumb rules that Google and Microsoft (but mostly Microsoft) set in place to discourage people from running their own servers.
However, given the amount of time that I've already spent to debug the Proton bridge and open PRs to fix their sh*t, I must acknowledge that running my own Postfix server and spending a couple of hours to set up the right DNS records would have probably saved me a lot of time (and money).