To view the settings, you have two options:
Option 1: From the inbox, press ‘File’, then ‘RMail Settings’.
Option 2: From the feature pop-up, press the ‘Settings’ button.
The Register Reply feature settings include:
Enable the option to the recipient to reply to email as a Registered Email message: When checked, the ‘Register Reply’ option will appear in the feature pop-up when sending a message, and the recipient will be able to reply as a Registered Email™.
Pre-select the Register Reply option by default: When checked, the ‘Register Reply’ option will be selected by default in the feature pop-up.