These incidents forced Yahoo to invalidate unencrypted security questions and implement mandatory password resets for millions of users. The fallout from these breaches significantly damaged Yahoo Mail’s standing as a secure primary email provider, causing many enterprise users and tech-savvy individuals to migrate to Gmail or Outlook.
Yahoo Mail officially launched on October 8, 1997, following Yahoo's acquisition of RocketMail, one of the world's first free webmail services. At the time, email was largely tethered to Internet Service Providers (ISPs) or paid services like AOL. yahoomail.com
This event triggered the "Storage Wars." Yahoo, realizing its existential threat, responded rapidly: following Yahoo's acquisition of RocketMail