939 Open Source Email Software Projects
Free and open source email code projects including engines, APIs, generators, and tools.
Nylas Mail 24648 ⭐
:love_letter: An extensible desktop mail app built on the modern web. Forks welcome!
Mailinabox 10708 ⭐
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 12045 ⭐
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
Community Edition 6195 ⭐
Free and Open Source messaging and emailing app that combines common web applications into one.
Tedgoas Cerberus 4372 ⭐
A few simple, but solid patterns for responsive HTML email templates and newsletters. Even in Outlook and Gmail.
Tutanota 4372 ⭐
Tutanota 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.
Grunt Email Workflow 3011 ⭐
A Grunt workflow for designing and testing responsive HTML email templates with SCSS.
Email Templates 3305 ⭐
: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 2732 ⭐
: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 2410 ⭐
Golang package that generates clean, responsive HTML e-mails for sending transactional mail
Lavabit Magma 1742 ⭐
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 2050 ⭐
The best free email forwarding for custom domains. Visit our website to get started (SMTP server)
Thoughtbot Bamboo 1756 ⭐
Testable, composable, and adapter based Elixir email library for devs that love piping.
H8mail 2203 ⭐
Email OSINT & Password breach hunting tool, locally or using premium services. Supports chasing down related email
Mailchecker 1321 ⭐
:mailbox: Cross-language temporary (disposable/throwaway) email detection library. Covers 38038+ fake email providers.
Fluentemail 1946 ⭐
All in one email sender for .NET. Supports popular senders (SendGrid, MailGun, etc) and Razor templates.
Mimekit 1332 ⭐
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
Django Anymail 1234 ⭐
Django email backends and webhooks for Amazon SES, Mailgun, Mailjet, Postmark, SendGrid, Sendinblue, SparkPost and more
Fiercephish 1048 ⭐
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 904 ⭐
The Official Twilio SendGrid Led, Community Driven C#, .NetStandard, .NetCore API Library
Sup Heliotrope Sup 798 ⭐
A curses threads-with-tags style email client (mailing list: [email protected])
Bootstrap Email 920 ⭐
Bootstrap stylesheet, compiler, and inliner for responsive and consistent emails with the Bootstrap syntax you know and love.
Truemail 845 ⭐
🚀 Configurable framework agnostic plain Ruby 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.
Thunderbird Conversations 542 ⭐
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 605 ⭐
Template generator for (responsive) emails & email signatures ✨
Premailer.net 529 ⭐
C# library that moves your stylesheets to inline style attributes, for maximum compatibility with E-mail clients.
Nylas Mail Lives Nylas Mail 476 ⭐
:love_letter: An extensible desktop mail app built on the modern web.
Socialscan 705 ⭐
Python library and CLI for accurately querying username and email usage on online platforms