There is a wide body of people that believe they are sending information private because they are sending using Microsoft Office 365, Gmail, or using a third-party service that sends all messages using transmission layer security.
When sending encrypted email using RMail services, the sender can choose one of the following options:
With RMail service, the sender can opt to send encrypted messages by Message-Level Encryption, Transport Layer Encryption, or a combination. As such, there are four scenarios for encrypted transmission. In all cases, the encrypted message is delivered direct to the recipient’s desktop; RMail never requires the recipient to visit a website to collect their email.