If you need to remove RMail from Gmail, please follow the following steps:
Remove RMail for Gmail Extension
- On your computer, open Chrome.
- At the top right, click the 3 menu dots next to your profile icon
- Click the option More Tools in the resulting drop down menu
- Click the Extensions option from the resulting drop-down menu
- Locate the RMail for Gmail extension pane and either disable the toggle button or remove the extension.