Mailspring

# 💌 Mailspring

**Mailspring is a new version of Nylas Mail maintained by one of the original authors. It's faster, leaner, and shipping today!** It replaces the JavaScript sync code in Nylas Mail with a new C++ sync engine based on [Mailcore2](https://github.com/MailCore/mailcore2). It uses roughly half the RAM and CPU of Nylas Mail and idles with almost zero "CPU Wakes", which translates to great battery life. It also has an entirely revamped composer and other great new features.

Mailspring's UI is open source (GPLv3) and written in TypeScript with [Electron](https://github.com/atom/electron) and [React](https://facebook.github.io/react/) - it's built on a plugin architecture and was designed to be easy to extend. Check out [CONTRIBUTING.md](https://github.com/Foundry376/Mailspring/blob/master/CONTRIBUTING.md) to get started!

Mailspring's sync engine is spawned by the Electron application and runs locally on your computer. [It is open source (GPLv3) and written in C++ and C.](https://github.com/Foundry376/Mailspring-Sync) For convenience, however, when you set up your development environment, Mailspring uses the latest version of the sync engine we've shipped for your platform so you don't need to pull sources or install its compile-time dependencies.

![Mailspring Screenshot](https://github.com/Foundry376/Mailspring/raw/master/screenshots/hero_graphic_mac%402x.png)

## Features

Mailspring comes packed with powerful features like Unified Inbox, Snooze, Send
Later, Mail Rules, Templates and more. Mailspring Pro, which you can unlock
with a monthly subscription, adds even more features for people who send a ton
of email: link tracking, read receipts, mailbox analytics, contact and company
profiles. **All of these features run in the client - Mailspring does not send
your email credentials to the cloud.** For a full list of features, check out
[getmailspring.com](https://getmailspring.com/).

## Download Mailspring

You can download compiled versions of Mailspring for Windows, Mac OS X, and
Linux (deb, rpm and snap) from
[https://getmailspring.com/download](https://getmailspring.com/download).

## Getting Help

You can find community-based help and discussion with other Mailspring users on our
[Discourse community](https://community.getmailspring.com/).

## Contributing

Mailspring is entirely open-source. Pull requests and contributions are
welcome! There are three ways to contribute: building a plugin, building a
theme, and submitting pull requests to the project itself. When you're getting
started, you may want to join our
[Discourse](https://community.getmailspring.com/) so you can ask questions and
learn from other people doing development.

[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v2.0%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)

### Running Mailspring from Source

To install all dependencies and run Mailspring from its source code,
run the following commands from the root directory of the Mailspring re