I never run a mail server but Google already placing my mail sent via my xyz domain hosted on proton to spam folder silently.
I guess running my own will be a lot worst.
P.S. I know that’s a bad TLD choice, and I’m planning to migrate, but that will take a lots of time and work to the point I wonders if that worth it as I don’t sent many anyways.
I bought it about a year after general availability when I’m still in college, and doesn’t know it will be this bad.