HoTMaiL (the capital H,T,M, and L are an homage to HTML) was a free online e-mail service started by Jack Smith and Sabeer Bhatia in 1995 that was later acquired by Microsoft in December of 1997. By 2001, Hotmail had over 100 million users and had become one of the most popular webmail services available. It allowed users to read and send e-mail wherever there is Internet access. The following picture shows an example of what Hotmail looked like in 1998.
In February of 2013, Microsoft announced it would be moving away from the Hotmail brand and that it will start to move its more than 300 million users to the new Outlook.com brand. Although Hotmail no longer exists, all old e-mail addresses remain the same, just with the new Outlook online interface.
Tip: Microsoft's Outlook webmail service can be found at https://outlook.live.com/owa/