It is a 100% free and open-source desktop email client. In other words, you can use it for Enriched contact profiles, Unified inbox, support unlimited email accounts, Unlimited customizable signatures, Multi-language spell check, Enhanced search capabilities, and more.
You can also easily compatible Nylas with Gmail, Yahoo, and more. It has several layout styles it was the beginning of 2016, it was licensed under MIT License. Nylas Mail was available for Mac, Windows, and Linux. it was built on the modern web with Electron, React, and Flux.
Windows and Linux