The email that arrives in you inbox looks very official. It carries the familiar Yahoo! Mail logo and has a heading that warns, "Your Account Will Be Blocked." If you're one of the millions of people who have a Yahoo! Mail account, you might be inclined to take the message seriously. "Due to the congestion in all Yahoo! users accounts, Yahoo! would be shutting down all unused accounts, " the message warns. "In order to avoid the deactivation of your account, you will have to confirm your e-mail by filling out your... read full review »