RMail® is integrated into Gmail as a Chrome Extension add-in. RMail for G-Suite uses the Gmail Chrome Extension. The RMail for Gmail and G-Suite add-in preserves the native functionality of Gmail and G-Suite and the outbound SMTP message stream.
Each e-sign completion and each message sent return the final Registered Receipt™ and e-sign records into the Gmail or G-Suite Inbox (into auto-generated receipt and contracts folders). These include delivery and e-sign forensics, cryptographically sealed to the delivery content and timestamp, and packaged as a Registered Receipt™ proof record or a signature certificate record.