email

The open-source notification Inbox infrastructure. E-mail, SMS, Push and Slack Integrations.

😱 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

: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!

MJML: the only framework that makes responsive-email easy

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...

Free and Open Source Enterprise Resource Planning (ERP)

A free simple responsive HTML email template

PHP Email address validator

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

Comprehensive mailing tools for PHP

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 pa...

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

K-9 Mail – Open Source Email App for Android

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.

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

Insular email distribution - mail server as Docker images

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

An automated e-mail OSINT tool

CLI to manage emails

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

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

iOS Debugging Tool 🚀

✉️ Composable all-in-one mail server.

A list of amazing Newsletters

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

An open source email campaign management tool for nonprofits

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

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

The SimpleLogin back-end

Create, preview (browser/iOS Simulator), and send custom email templates for Node.js. Made for @forwardemail, @ladjs, @cabinjs, @spamscanner, and @br...

A dead simple Go library for sending notifications to various messaging services.

✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat

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

Mail hosting made simple

:email: An Example of using an HTML form (e.g: "Contact Us" on a website) to send Email without a Backend Server (using a Google Script) perfect for s...

Papercut SMTP -- The Simple Desktop Email Server

All in one email sender for .NET. Supports popular senders (SendGrid, MailGun, etc) and Razor templates.

Use Tailwind CSS to design HTML emails.

A Grunt workflow for designing and testing responsive HTML email templates with SCSS.

📫 A serverless email server on AWS using S3 and SES

Juice inlines CSS stylesheets into your HTML source.

Golang package that generates clean, responsive HTML e-mails for sending transactional mail

The Official Twilio SendGrid Led, Community Driven Node.js API Library

Notifications for Ruby on Rails applications

Send email in Python conveniently for gmail using yagmail

✉️ An awesome list of resources to build better emails.