Facebook and Google are using a new system to filter fake e-mail messages. The system is being developed by Google, Microsoft and Yahoo. The service is aimed at preventing e-mails from being phoned in the U.S. from being spoofed. The company says it’s working to make the system available to all users of the service available to the general public. It’s not yet clear how effective the system will work in the United States, but it could be used in other countries.”]