sync-engine - :incoming_envelope: IMAP/SMTP sync system with modern APIs

•    Python

The Nylas Sync Engine provides a RESTful API on top of a powerful email sync platform, making it easy to build apps on top of email. See the full API documentation for more details.Install the latest versions of VirtualBox and Install Vagrant.

Mailspring - A beautiful, fast Webmail

•    Javascript

Mailspring is built on the modern web with Electron, React, and Flux. It is designed to be extensible, so it's easy to create new experiences and workflows around email.

Rainloop Webmail - Simple, modern & fast web-based email client

•    PHP

Simple, modern & fast web-based email client.Modest system requirements, decent performance, simple installation and upgrade, no database required - all these make RainLoop Webmail a perfect choice for your email solution.

Roundcube Webmail - Browser-based multilingual IMAP client

•    PHP

Roundcube Webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an email client, including MIME support, address book, folder management, message searching and spell checking.

Mailu - Mail server as a set of Docker images

•    Python

Mailu is a simple yet full-featured mail server as a set of Docker images. The project aims at providing people with an easily setup, easily maintained and full-featured mail server while not shipping proprietary software nor unrelated features often found in popular groupware.

WebClients - Monorepo hosting the proton web clients

•    TypeScript

This project is a monorepo hosting the proton web clients. It includes the web applications, their dependencies & shared modules as well as all tooling surrounding development of the web clients (as well as some additional miscellaneous things). Technically, this monorepo is based on Yarn 2 & Yarn Workspaces, with unified versioning for all packages inside.

IRedMail - Free, Open Source Email Server Solution for Linux

•    Shellscript

iRedMail is a fully fledged, full-featured mail server solution. It uses open source packages like Postfix, Dovecot, Apache, MySQL, OpenLDAP, Amavisd, RoundCube etc to provide this solution.

Hastymail - IMAP/SMTP client in PHP

•    PHP

Hastymail is a fast, secure, rfc-compliant, cross-platform IMAP/SMTP client application written in PHP providing a clean web interface for sending and reading E-mail. It is compatible with PDAs, phones, text browsers, and all mainstream browsers. The ability to use a database for storing user settings, contacts, and plugin data, with support for both Postgresql and Mysql.

SharpWebMail - ASP.NET Webmail Application

•    CSharp

SharpWebMail is an ASP.NET webmail application that is written in C#. It uses a POP3 or IMAP servers as the mailstore and sends mail through a SMTP server. It is very simple to configure (only a few settings in the web.config file). You can compose HTML messages, search your inbox, read complex mime messages, have multiple address books and much more.

mailur - Sleek webmail inspired by Gmail

•    Python

Mission: bring innovations into webmail. Brand-new version uses Dovecot as the main storage, no database required.

Tutanota - Encrypted MailBox

•    Javascript

Tutanota automatically encrypts all your data on your device. Your emails as well as your contacts stay private. You can easily communicate with any of your friends end-to-end encrypted. Even subject and attachments as well as all your contacts are encrypted. It provides an open webmail service that is very easy to use.

Modoboa - Mail hosting made simple

•    Python

Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface. It provides useful components such as an administration panel or a webmail. Its main features include Administration panel, Amavisd-new frontend, Webmail, Per-user Sieve filters, Autoreply messages for Postfix, Graphical statistics about email traffic and lot more.

SquirrelMail - Webmail

•    PHP

SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.

Cypht - Lightweight Open Source webmail written in PHP and JavaScript

•    PHP

All your E-mail, from all your accounts, in one place. Cypht is not your father's webmail. Unless you are one of my daughters, in which case it is your father's webmail. Cypht is like a news reader, but for E-mail. Cypht does not replace your existing accounts - it combines them into one. And it's also a news reader..

Mailpile - Mordern Web Mail

•    Python

Mailpile is a modern web-mail you run on your own computer. It is a personal e-mail searching and indexing tool, largely inspired by Google's popular proprietary-but-gratis e-mail service. It wants to eventually become a fast and flexible back-end for awesome personal mail clients, including webmail. It supports importing archived mails from Gmail, IMAP server, Mbox etc. It supports PGP encryption and verification of emails and recipients.

ProtonMail - Web client for the ProtonMail secure email service

•    Javascript

ProtonMail provides secure email service. All emails are secured automatically with end-to-end encryption. This means even we cannot decrypt and read your emails. As a result, your encrypted emails cannot be shared with third parties.

oMail (hMailServer Webmail)

This is an open-source version of OElite Webmail (oMail) is is part of the OElite platform. hMailServer was also natively supported in this project.

Taha Mail

•    Java

A Java Web Based Mail

Isotope Mail Client - Microservice based webmail client built with ReactJS and Spring

•    Java

Isotope Mail client is a microservice based webmail client built with ReactJS and Spring. One of the main reasons to develop Isotope Mail is to learn and showcase new technologies, frameworks and libraries and how they can be used in a real life product. There is a stronger focus on achieving top quality code rather than delivering a large number of features.

neutron - Self-hosted server for the ProtonMail client

•    Go

Self-hosted server for Protonmail client.This project is not affiliated or supported by ProtonMail.