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.
Dada Mail
Dada Mail was initially written in December 1999 and released as version 1.0 in January 2000, between Justin's first and second semester at the University of Colorado at Boulder. Its original name was Mojo Mail, a name that came to Justin after having a dream about making a successor to the Majordomo program, after struggling with that program's email-based interface for a non-profit client.