I think there shold be multiple email id for post update notification, because most of the time we receive notification at our personal email id (like gmail or msn) which are not accessible in most of the offices.
So if there is a miltiple email id notification (xyz@domain.com;
abc@domain.com) we can get notification at both offical email id as well as personal email id. User's choice.
That's what i miss currently.