History of Yahoo!
On March 8, 1997, Yahoo! acquired online communications company Four11. Four11's webmail service, Rocketmail, became Yahoo! Mail. Yahoo! also acquired ClassicGames.com and turned it into Yahoo! Games. Yahoo! then acquired direct marketing company Yoyodyne Entertainment, Inc. on October 12, 1998. In January 1999, Yahoo! acquired web hosting provider GeoCities. Another company Yahoo! took over was eGroups, which became Yahoo! Groups in June 2000. On March 8, 1998, Yahoo! launched Yahoo! Pager, an instant messaging service that was renamed Yahoo! Messenger a year later.
RocketMail
On 19 June 2008, Yahoo! started the RocketMail brand again by allowing new users to sign up for accounts under the rocketmail.com domain, which had not been possible since its acquisition of Four11 Corporation. In April 2013, Yahoo! closed support for creating new Rocketmail email addresses; existing Rocketmail accounts were not affected.