Why is it not possible to send messages to some people?

"We respect the privacy of our users above all else and have made it impossible to send personal messages to people that you are not friends with on Your Virtual Garage. You are also guaranteed to never receive messages in Your Virtual Garage from people that are not on your friend list."

How can I turn off my email notifications or edit them?

"When you are logged in to Your Virtual Garage, you will find the link 'settings' from the top right navigation. Next, choose email notifications, and activate the appropriate radio buttons."