What is Outlook Express?

Outlook Express is a discontinued email client also known as Microsoft Internet Mail and News, bundled with internet explorer version from 3.0 to 6.0. It was included with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003 but in Windows Vista Outlook Express was replaced by Windows Mail.

There is a differentiation between Outlook Express and Microsoft Outlook: they don’t have the same codebase, but they have a common architectural philosophy.

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