And this is why I host my own email server, even if I am not a journalist investigating governments or anything of the sort. It's a matter of control over my computing.
Common folklore is that this is extremely onerous to self-host (and have it work successfully.) How did you go about it?
Even if you can't send email at all (unlikely if you use an outbound relay), there are very significant privacy benefits to having your own server. I send very few emails relative to the number I receive. You couldn't pay me enough to go back to one of big commercial providers.