If you are using the RMail for GMail extension and the Send Registered button is not working. Please try the steps listed below to resolve the issue.
1. Log out of Gmail.
2. Remove the RMail for Gmail extension in Chrome.
3. Clear Cache in Chrome.
4. Reboot Chrome.
6. Add the RMail for Gmail button.
5. Log into Gmail.
Send some tests email to yourself to verify that everything is functioning - if not please submit a support ticket at and we will contact you.