Spam mails are commonly received in inbox of Yahoo Mail account holders. They are sent as if they are from your friends or relatives. Not only one such mail is received. Mails follow one after the other at periodic intervals. They are of the same type. There will be 'No Subject'; it will contain many email addresses in its 'To' box; among them one will be that of yours. The content of the mail shall contain only an URL, and it shall prompt you to click on it. These URLs end with cqiq=cqiq or megs=megs. Beware of these spam mails: don't click in them; but delete them all without opening. They are not from your friends or relatives; but are from fraudsters.