Microsoft has two official mail apps for Windows 10. Windows Mail is the free offering that ships with the OS and is available through the Windows Store, while Outlook is part of the company's Office 365 suite.
Microsoft is pushing an update out for Mail and Calendar to those on an Insider build of Windows 10. The update brings a few new features to the app, like the ability to open email messages in a new window and more.
Microsoft has posted a general development update on its Mail and Calendar apps for Windows 10. It offers a list of recent feature additions, which include two ways for users to check on what's been added in recent app updates
Viewing mail in a new pop-out window is handy for those who wish to check through messages without having the UI of the main inbox present and cluttering up the screen. Unfortunately, this feature isn't available in the built-in Mail app for Windows 10, but this is about to change.
A new version of Outlook Mail & Calendar is available in the Store for Windows 10 Mobile. This update brings the new formatting and email sizing feature to all Windows 10 Mobile devices and puts all phones on the same version number for the email app.
Members of the Windows Insider program can download a new version of the Mail and Calendar app for Windows 10. It adds a few new features that will likely be added to the app for non-Insiders in the future.