Yahoo! Mail
Yahoo! Mail is an email service launched in 1997 through the American parent company Yahoo!. Yahoo Mail provides four different email plans: three for personal use (Basic, Plus, and Ad Free) and another for businesses. By December 2011, Yahoo! Mail had 281 million users, making it the third largest web-based email service in the world. Since 2015 its webmail client also supports managing non-Yahoo e-mail accounts.
Oddpost
Oddpost was purchased by Yahoo! on July 9, 2004, and became the new version of their Yahoo! Mail service. On September 14, 2005, Yahoo! Mail started letting some users register to beta test the new Yahoo! Mail web client.