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Mail and Calendar - Official app in the Microsoft Store
Find and download Windows Live Mail - Microsoft Support
Gmail - App
Windows 10 mail app: how to reinstall - Microsoft Community
How to get started with the Mail app on Windows 10
Set up email in the Mail app - Microsoft Support
Getting started with the new Outlook for Windows
Windows 10's Built-In Mail App: Everything You Need to Know
Getting Started with Windows Mail in Windows 10 - groovyPost
How to use the Mail app in Windows 10 | TechRadar