682 Open Source Email Software Projects
Free and open source email code projects including engines, APIs, generators, and tools.
Nylas Mail 24558 ⭐
:love_letter: An extensible desktop mail app built on the modern web. Forks welcome!
Mailinabox 9529 ⭐
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.
Mailspring 9340 ⭐
:love_letter: A beautiful, fast and maintained fork of @Nylas Mail by one of the original authors.
Community Edition 5571 ⭐
Free and Open Source messaging and emailing app that combines common web applications into one.
Tedgoas Cerberus 4036 ⭐
A few simple, but solid patterns for responsive HTML email templates and newsletters. Even in Outlook and Gmail.
Tutanota 3541 ⭐
Tutanota is an email client with a strong focus on security and privacy that lets you encrypt emails on all your devices.
Grunt Email Workflow 2949 ⭐
A Grunt workflow for designing and testing responsive HTML email templates with SCSS.
Email Templates 2947 ⭐
:mailbox: Create, preview, and send custom email templates for Node.js. Highly configurable and supports automatic inline CSS, stylesheets, embedded images and fonts, and much more!
Learn To Send Email Via Google Script HTML No Server 2343 ⭐
: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 static websites that need to collect data.
Matcornic Hermes 2086 ⭐
Golang package that generates clean, responsive HTML e-mails for sending transactional mail
Lavabit Magma 1671 ⭐
The magma server daemon, is an encrypted email system with support for SMTP, POP, IMAP, HTTP and MOLTEN,. Additional support for DMTP and DMAP is currently in active development.
Free Email Forwarding 1675 ⭐
The best free email forwarding for custom domains. Visit our website to get started (SMTP server)
Thoughtbot Bamboo 1484 ⭐
Testable, composable, and adapter based Elixir email library for devs that love piping.
H8mail 1302 ⭐
:mailbox_with_no_mail::mag_right: Email OSINT & Password breach hunting tool, locally or using premium services. Supports chasing down related email
Mailchecker 1205 ⭐
:mailbox: Cross-language temporary (disposable/throwaway) email detection library. Covers 33600 fake email providers.
Mimekit 1141 ⭐
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
Django Anymail 1020 ⭐
Django email backends and webhooks for Amazon SES, Mailgun, Mailjet, Postmark, SendGrid, Sendinblue, SparkPost and more
Fiercephish 907 ⭐
FiercePhish is a full-fledged phishing framework to manage all phishing engagements. It allows you to track separate phishing campaigns, schedule sending of emails, and much more.
Sendgrid Csharp 789 ⭐
The Official Twilio SendGrid Led, Community Driven C#, .NetStandard, .NetCore API Library
Sup Heliotrope Sup 766 ⭐
A curses threads-with-tags style email client (mailing list: [email protected])
Bootstrap Email 661 ⭐
Bootstrap 4 (and soon 5) stylesheet, compiler, and inliner for responsive and consistent emails with the Bootstrap syntax you know and love.
Truemail 585 ⭐
🚀 Configurable framework agnostic plain Ruby 📨 email validator. Verify email via Regex, DNS and SMTP. Be sure that email address valid and exists.
Thunderbird Conversations 492 ⭐
An extension for Thunderbird that allows you to view threads as "real" conversations, including your own emails. This extension also adds a bunch of useful UI features in the conversation view.
Responsive HTML Email Signature 498 ⭐
Template generator for (responsive) emails & email signatures ✨
Premailer.net 484 ⭐
C# library that moves your stylesheets to inline style attributes, for maximum compatibility with E-mail clients.
Nylas Mail Lives Nylas Mail 467 ⭐
:love_letter: An extensible desktop mail app built on the modern web.
Socialscan 451 ⭐
Check email address and username availability on online platforms with 100% accuracy