New Contacts added Based on Received Mail

New Contacts added Based on Received Mail

Every time I receive a new email, the address is automatically added to my contacts list.  Is there an option to turn this off?  My contact list grows exponentially each day with contacts from all kinds of junk mail. 

It would be better functionality if the system would ask the user if they wanted to add the sender to contacts.  If the user chooses not to add the sender to contacts, then it should never prompt for that sender again.