> Each time you connect to our service, we log your IP address, your client identifier (browser or mail client information) and your username.
I'm sorry dude, but that decision from switching to fastmail was not very productive to counteract the specific case mentioned on the OP.
If anything, it's even worse since fastmail apparently always logs your IP.
Moreover:
> We process mail sent and received from your account to block spam and fraud. We receive information from third party services to assist us in identifying spam.
Looks like your emails aren't even encrypted. If any government body what's your email bodies, they'll have it. They even share it with 3rd parties for fraud detection.
With protonmail and similar services, they'll just log your IP if they're asked to do so, which you can obfuscate using a decent enough VPN.
