Google winning against Spammers and Phishers

According to Google, the Internet-wide efforts against unauthenticated emails, which can be used by spammers and phishers to fake email addresses and deceive users, are working. In fact, the vast majority of non-spam email that Gmail users receive, is authenticated with standards designed to fight phishing. 

Source: http://www.socialappshq.com/blog/2013/12/09/google-winning-against-spammers-and-phishers/