|Founded||September 1, 1994|
It also developed RocketMail, one of the first major, free webmail services. For a brief time, RocketMail battled with Hotmail for the number-one spot among free webmail services. Four11, including RocketMail, was acquired by Yahoo! in 1997 for $92 million and used the RocketMail engine to create Yahoo! Mail.
- "Four11.com WHOIS, DNS, & Domain Info - DomainTools". WHOIS. Retrieved 2016-07-20.
- Shankland, Stephen (18 June 2008). "Yahoo Mail hopes to lure users with 'ymail.com'". CNET News. Retrieved 8 July 2010.
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