Email Open Source Projects

😱 Falsehoods Programmers Believe in

:love_letter: An extensible desktop mail app built on the modern web. Forks welcome!

The classic email sending library for PHP

Parse Server for Node.js / Express

MJML: the only framework that makes responsive-email easy

:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

✉️ Send e-mails with Node.JS – easy as cake!

Tools of The Trade, from Hacker News.

Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

A free simple responsive HTML email template

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

holehe allows you to check if the mail is used on different sites like twitter, instagram and will retrieve information on sites with the forgotten password function.

The world's best AI personal assistant for email. Open source app to help you reach inbox zero fast.

PHP Email address validator

Low code web framework for real world applications, in Python and Javascript

Open-source cron job and background task monitoring service, written in Python & Django

Comprehensive mailing tools for PHP

Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.

Distributed and fault-tolerant realtime computation: stream processing, continuous computation, distributed RPC, and more

梦想是做出最棒的生肉翻译软件喵

Prometheus Alertmanager

Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

Insular email distribution - mail server as Docker images

Responsive transactional HTML email templates

The SimpleLogin back-end and web app

A cross-platform .NET library for IMAP, POP3, and SMTP.

Apache Storm

CLI to manage emails

逃离996

Tron

A flexible event/agent & automation system with lots of bees 🐝

Free and Open Source messaging and emailing app that combines common web applications into one.

EDK II

✉️ Composable all-in-one mail server.

:mailbox: SMTP Server + Web Interface for viewing and testing emails during development.

An automated e-mail OSINT tool

JanusGraph: an open-source, distributed graph database

comment engine

a list of disposable email domains

Drag-n-Drop Email Editor Component for React.js

A few simple, but solid patterns for responsive HTML email templates and newsletters. Even in Outlook and Gmail.

Email OSINT & Password breach hunting tool, locally or using premium services. Supports chasing down related email

FirebaseUI is an open-source JavaScript library for Web that provides simple, customizable UI bindings on top of Firebase SDKs to eliminate boilerplate code and promote best practices.

Anonymous email forwarding

Fully featured, open source, privacy friendly email app for Android

An JWT based API for managing users and issuing JWT tokens.

A list of amazing Newsletters

HEML is an open source markup language for building responsive email.

A temporary email right from your terminal written in POSIX sh

iOS Debugging Tool 🚀

Simple, modern & fast web-based email client

smtp4dev - the fake smtp email server for development and testing

LaTeX Thesis Template for the University of Chinese Academy of Sciences

搭建专属于你的消息推送服务，支持多种消息推送方式，支持 Markdown，基于 Golang 仅单可执行文件，开箱即用

Preview mail in the browser instead of sending.

Gmail JavaScript API

An open source email campaign management tool for nonprofits