When I add or remove members from Security Roles, I have an option to send notification via a checkbox. But no matter what I do a notification is always sent to the user concerned. Is there anyway to stop the notification aside from leave my smtp settings as blank?

My dnn site is being used as a portal and I think it will be cause spam if I make use of this notification. Imagine being involved in 5 dnn groups then you'll recieve 5 different emails telling you that you're part of the group. Doesn't seem elegant.