Mailspring: A Faster, Leaner, Open-Source Email Client
Mailspring, a new iteration of Nylas Mail maintained by one of the original authors, is faster, leaner, and available now! It replaces Nylas Mail's JavaScript sync code with a new C++ sync engine based on Mailcore2, using roughly half the RAM and CPU. Its near-zero CPU idle wake-ups translate to significant battery life improvements. It also boasts a revamped composer and other new features. The UI is open source (GPLv3), built with TypeScript, Electron, and React, and features a plugin architecture for easy extension. The sync engine, also open source (GPLv3) and written in C++ and C, runs locally. Powerful features include a unified inbox, snooze, send later, mail rules, templates, and more. Mailspring Pro, a paid subscription, adds features like link tracking and read receipts.