If you need to remove RMail from Outlook or Gmail, please follow the following steps:

Remove RMail for Outlook Desktop

1. In Outlook, click on the FILE menu 
2. Select Options from the bottom of the blue side bar menu  
3. Select Add-Ins from the bottom of the left side bar menu
4. At the Manage window, make sure "COM Add-Ins" is selected and hit the Go button
5. Select RMail Send Registered from the list to highlight it and then click the Remove button