GlassFrog allows users to determine how frequently they receive email notifications.

To change your settings, navigate to the Notifications page via the menu option under your profile name (see screenshot):

Make changes to your notifications in each of your circles by selecting or un-selecting the check boxes.  You can subscribe to Governance, Tactical and Note changes.  

By default you will receive individual emails for the circles in which you are a member.  Premium GlassFrog users can add subscriptions for additional circles in their organizations.