Hotmail now known as Outlook.com or Microsoft's web email service Hotmail is widely used for mail services around the world. Hotmail is service provided by Microsoft Corporation and is also known as Windows Live Mail provider. Hotmail is a free web mail service provider founded by Sabeer Bhatia and Jack Smith in 1996. To obtain Hotmail email services you need to have a account on hotmail or outlook and must have email address and password.