Yahoo Mail is a free email service (except for Yahoo Mail Business Email Plans) offered by the American company Yahoo! It was launched in 1997, and, according to comScore, Yahoo Mail was the third-largest web-based email service with 281 million users as of December 2011. As many as three web interfaces were available at any given date. The traditional “Yahoo Mail Classic” preserved the availability of their original 1997 interface until July 2013 in North America. A 2005 version included a new Ajax interface, drag-and-drop, improved search, keyboard shortcuts, address auto-completion and tabs. However other features were removed, such as column widths and one click delete-move-to-next. In October 2010, Yahoo released a beta version of Yahoo Mail that included improvements to performance, search and Facebook integration. In May 2011 it became the default interface. Their current Webmail interface was introduced during 2012. Yahoo Mail had unlimited storage from March 27, 2007 until October 8th, 2013. The new design introduced to users from October 2013 was met with heavy criticism of its layout and user ability. Yahoo Mail suffered a major outage where some users could not access their email messages beginning December 10, 2013 until December 12th, 2013, when the outage was fully resolved.