From [1]: > Does Helm have access to my emails? > The architecture of the system has been designed so that it's not possible for Helm to access your emails. Email senders now support sending emails over an encrypted SSL/TLS channel where the email is only decrypted once it reaches your personal email server. Helm is not able to decode these emails because we don't have access to the encryption key. In the limited sit…
The reason that the using the server's actual IP wouldn't work is that most residential IP ranges are responsible for mostly spam (so most outgoing email would likely be filtered), and some ISPs don't assign static IPv4 addresses to residential users (IPv6 would fix the later issue, but mass IPv6 adoption isn't going to happen for a while).