“email is inherently insecure, email can never be secure, it leaks a LOT of metadata and only the body is encrypted, subject can NOT be encrypted, you can NOT build a secure system on top of email”
“email is inherently insecure, email can never be secure, it leaks a LOT of metadata and only the body is encrypted, subject can NOT be encrypted, you can NOT build a secure system on top of email”
Matrix could be a good solution, though that only works if the services support it as an activation and verification service.