Use an email provider wholly owned and hosted in a country that's non-cooperative with your country, preferably one with an official language that differs from

Use an email provider wholly owned and hosted in a country that's non-cooperative with your country, preferably one with an official language that differs from your country's. That alone will help you avoid standard subpoenas / legal requests. Add Tor and encryption on top of that and there is almost no chance of government interference, unless you're a terrorist / subversive.