Tuta Mail

Attempts to create a new account over Tor usually result in errors like "Registration is temporarily blocked for your IP address to avoid abuse".

Every email service provider is a honeypot because it's an account based centralized service controlled by one officially registered compliant entity that either already fully leaked its database or will leak it soon due to coercion and hacks. You should never use emails for anything important. If you must use a centralized email service, then minimize your metadata leakage with Tor and encrypt messages with PGP.