> we both have email hosting in Europe

If this is for privacy reasons, I have to point it out that the GDPR protects the data of people that are physically in the EU. I'm not a lawyer, but I'm not sure this applies to non-EU citizens that just happen to deposit some of their data in the EU without being physically here. Maybe you should delve in this corner case deeper, or if you did, I'm curious to know the answer.