It seems that yahoo appears to be temporary out of service with the Yahoo Mail, Yahoo home page and Flickr. There is a technical difficulty with the Yahoo services. This affects most of the users all over the world.
DownForEveryoneorJustMe.com conforms that the yahoo service is down and the reason for the outage is yet to receive. According to Twitter Complaints, the service went down by 1:25PM ET.
Recently there was a temporary outage service with Google few days before and today Yahoo service was down which makes the user to be really hard experience