Microsoft Mail is a file-based E-mail system intended for corporate usage. Its main competitors are ccMail from Lotus. A stripped-down version was included in Windows 95 and Windows NT 4.0. The last version is 3.5 and was replaced by Microsoft Exchange Server (which continues its version number and begin at 4.0).

Its client software was also named Microsoft Mail and was included in some older versions of Microsoft Office such as version 4.x. Later, they were replaced with the much more powerful Microsoft Exchange and later Outlook (Windows) and Entourage (Mac).

Windows e-mail clients | Discontinued Microsoft software