Group moderator email notification

When a group is developed in Buddypress, you have the option to assign a group moderator. This I have done within the Buddypress BlogsMU set up. Now the question, are group moderators supposed to receive email notifications when anyone posts within the group? I just assumed they would but it appears they don't. I then went into all the various settings in the backend and couldn't find a way to create/change the setting.

Does this have anything to do with BlogsMU or is this entirely a Buddypress issue? Is there a way to allow moderators to receive notifications via emails?

Dave