There a few settings that you have to enable in order to fully turn on email notification triggering on feedback within a feedback action page. 

 We have a wonderful post in our HOWTO's to checkout here: Notification Emails

1) Ensure that the "Receive emails" checkbox is checked within your profile. *Caution: if you disable this box, you will opt-out and no longer receive email from anyone within your nation.*

2) Turn on "Email notifications" within your profile. Go to Profile > Your Account > Email Notifications

3) Make sure that the check box for "Disable email notifications from NationBuilder to control panel users" is unchecked. Go to Settings > Defaults > Basic and scroll to the bottom to see this checkbox.

4) Within Website > Site Settings > Basic > Check the box for "Email new comments and feedbacks to page followers"