Outlook.com, formerly named Hotmail, is a free webmail service that is part of the Microsoft 365 product family. It offers mail, calendaring, contacts, and tasks services.
Founded in 1996 by Sabeer Bhatia and Jack Smith as Hotmail, it was acquired by Microsoft in 1997 for an estimated 400millionandrelaunchedasMSNHotmail,laterrebrandedtoWindowsLiveHotmailaspartoftheWindowsLivesuiteofproducts.MicrosoftphasedoutHotmailinOctober2011,relaunchingtheserviceasOutlook.comin2012.HotmailservicewasfoundedbySabeerBhatiaandJackSmith,andwasoneofthefirstwebmailservicesontheInternetalongwithFour11′sRocketMail(laterYahoo!Mail).ItwascommerciallylaunchedonJuly4,1996,symbolizing"freedom"fromISP−basedemailandtheabilitytoaccessauser′sinboxfromanywhereintheworld.Thename"Hotmail"waschosenoutofmanypossibilitiesendingin"−mail"asitincludedthelettersHTML,themarkuplanguageusedtocreatewebpages(toemphasizethis,theoriginaltypecasingwas"HoTMaiL").Thelimitforfreestoragewas2MB.HotmailwasinitiallybackedbyventurecapitalfirmDraperFisherJurvetson.ByDecember1997,itreportedmorethan8.5millionsubscribers.HotmailinitiallyranunderSolarisformailservicesandApacheonFreeBSDforwebservices,beforebeingpartlyconvertedtoMicrosoftproducts,usingWindowsServicesforUNIXinthemigrationpath.HotmailwassoldtoMicrosoftinDecember1997forareported400 million, and it joined the MSN group of services.
The sale had been preceded by a major incident in 1997 where all email was lost for 25 % of mailboxes.
Hotmail quickly gained in popularity as it was localized for different markets around the globe, and became the world's largest webmail service with more than 30 million active members reported by February 1999.
Hotmail originally ran on a mixture of FreeBSD and Solaris operating systems. A project was started to move Hotmail to Windows 2000.