Yahoo! Mail added a new feature that lets users filter the contents of their in-box to see only the messages from their contacts. In shot a simpler ways to cut out any in-box clutter from people you don't know. To enable the feature, users must first create a Yahoo profile over at profiles.yahoo.com, then add people you wish to list as contacts and might want to make “onnections” with. Once you invite those users to be your connections, and they accept, they'll show up as connections. And then you can click the "From Connections" button in your inbox to only see messages from people you actually know.