
Windows Mail was formally announced on Septemat Channel 9 and positioned as the successor to Outlook Express. It supported Post Office Protocol (POP) and Internet Message Access Protocol (IMAP) email protocols, but no longer supported Microsoft's proprietary mail-over- HTTP scheme, an omission inherited by Windows Mail. Outlook Express 7 introduced various changes to the user interface and relied on WinFS for the management and storage of contacts, email, and other data. Windows Mail can be traced to a pre-release version of Outlook Express 7 included in early builds of Windows Vista (then known by its codename, "Longhorn").

A screenshot of Windows Mail displaying a user's Inbox folder
