Yahoo!Mail officially paves the way for the emergence of the “social inbox” trend, with the introduction of new features similar to that of popular social networking sites, including, among others, getting updates from contacts when they share photos, write reviews, and update status. Yahoo!Mail has likewise introduced third-party apps into its page. including Picnik, ZumoDrive, Flickr, PayPal, and Photobucket, to name a few.
More: Yahoo! points the way to ‘social inbox’ | Yahoo!Mail, Search, and Messenger Upgrades