Build 10061 follows the launch of Build 10049 in late March.
Microsoft has unveiled a new build of Windows 10 with some changes and additional features, including new mail and calendar apps.
The new 10061 build will be available to Windows Insiders on the Fast ring through Windows Update.
Build 10061, which follows the launch of Build 10049 in late March, features a new three-pane email user interface with a toggle to rapidly move between email and calendar.
Users can also make their own Swipe Gestures to carry out operations like moving, deleting, or marking mails.
Microsoft said in a blog post: "Mail leverages the familiar and rich capability of Word to that allows you to easily insert tables, add pictures and use bullets and color to your text. Both the new Mail and Calendar apps support Office 365, Exchange, Outlook.com, Gmail, IMAP, POP and other popular accounts."
The build 10061 of Windows 10 brings visual improvements to the start menu, taskbar, and action center.
Users can adjust the colour scheme and transparency of the elements using the personalisation options in the Settings menu.
The other improvements in the new build include the optimisation of taskbar with increased size to support better touch. There are also improvements to task view and virtual desktop.
Microsoft has fixed an issue that prevented users from enabling Hyper-V with Windows 10 Desktop in the new build. The company has also fixed several mail indexing and Spartan bugs.