Please check if the following is taken care of
- The email of the user with whom the idea is shared needs to configured in the SharePoint User Profile
- In the Administration section, please navigate to Manage App Setting->Stop Notification and ensure that the check box is not selected
- In the Administration section, please navigate to Email Templates->Stop Notification and ensure that the checkbox there is unchecked
- If the problem persists, please contactsupport@saketa.com