Outlook
https://outlook.live.com/Get free Outlook email and calendar, plus Office Online apps like Word, Excel and PowerPoint. Sign in to access your Outlook, Hotmail or Live email account.
Microsoft Mail - Wikipedia
en.wikipedia.org › wiki › Microsoft_MailMicrosoft Mail Server was eventually replaced by Microsoft Exchange; Microsoft Mail Client, Microsoft Exchange Client, and Schedule+ were eventually replaced by Outlook (Windows and Mac). Server Architecture. Microsoft Mail was a shared-file mail system; the "postoffice" was a passive database of files which could reside on any file server.