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60 Email software solutions and projects

  • Mail-in-a-Box

    9.2 7.1 L3 Python
    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.
  • Listmonk

    9.1 9.3 Go
    High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.
  • The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
    Promo
  • Postal

    9.1 9.1 Ruby
    ✉️ A fully featured open source mail delivery platform for incoming & outgoing e-mail
  • MailHog

    9.1 0.0 Go
    Web and API based SMTP testing
  • docker-mailserver

    9.0 8.7 Shell
    A fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) using Docker. [Moved to: https://github.com/docker-mailserver/docker-mailserver]
  • Mailpile

    8.8 4.0 L2 Python
    A free & open modern, fast email client with user-friendly encryption and privacy features
  • Mautic

    8.8 10.0 L2 PHP
    Mautic: Open Source Marketing Automation Software.
  • Mailcow

    8.6 9.5 JavaScript
    mailcow: dockerized - 🐮 + 🐋 = 💕
  • Roundcube

    8.5 9.5 L3 PHP
    The Roundcube Webmail suite
  • Mail For Good

    8.3 0.0 JavaScript
    An open source email campaign management tool for nonprofits
  • MailCatcher

    8.3 6.1 L5 Ruby
    Catches mail and serves it through a dream.
  • LibreNMS

    8.3 9.8 L2 PHP
    Community-based GPL-licensed network monitoring system
  • Mailtrain

    8.2 0.0 JavaScript
    Self hosted newsletter app
  • Mailu

    8.2 9.4 Python
    Insular email distribution - mail server as Docker images
  • Tutanota makes encryption easy

    8.2 9.8 TypeScript
    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.
  • Haraka

    8.0 7.2 L3 JavaScript
    A fast, highly extensible, and event driven SMTP server
  • RainLoop

    8.0 0.0 L3 PHP
    Simple, modern & fast web-based email client
  • ProtonMail Web Client

    7.8 10.0 TypeScript
    Monorepo hosting the proton web clients
  • SimpleLogin

    7.7 8.9 Python
    The SimpleLogin back-end and web app
  • Modoboa

    7.1 9.2 L5 Python
    Mail hosting made simple
  • formspree

    7.0 0.0 L3 Python
    The successor to this repository is actively maintained at https://formspree.io. Its source code is not available
  • AnonAddy

    6.8 7.8 PHP
    Anonymous email forwarding
  • wildduck

    6.4 9.1 JavaScript
    Opinionated email server
  • DebOps

    6.0 8.9 Jinja
    DebOps - Your Debian-based data center in a box
  • Mailman

    5.9 0.0 L5 Ruby
    The Gnu mailing list server.
  • Maildrop

    5.5 0.0 CSS
    Disposable email SMTP server, also useful for development.
  • Dovecot

    5.5 9.8 L3 C
    Dovecot mail server
  • phpList

    5.4 7.0 PHP
    Fully functional Open Source email marketing manager for creating, sending, integrating, and analysing email campaigns and newsletters.
  • Exim

    5.2 9.3 L1 C
    Exim Mail Transport Agent - source, testsuite and documentation
  • Cypht

    5.2 9.4 L4 PHP
    Cypht: Lightweight Open Source webmail written in PHP and JavaScript
  • Disposable Mailbox

    4.6 0.0 PHP
    Simple disposable mailbox web-app based on a catch-all IMAP mailbox.
  • OpenSMTPD

    4.5 9.2 L2 C
    This is official OpenSMTPD Portable repository. Forks, pull requests and other contributions are welcome!
  • WebMail Lite

    4.5 0.0 L2 PHP
    AfterLogic WebMail Lite PHP. Fast and easy-to-use webmail front-end for your existing IMAP mail server, Plesk or cPanel.
  • MailyHerald

    4.4 0.0 L5 Ruby
    Advanced email processing solution for Ruby on Rails applications
  • homebox

    3.9 9.2 Shell
    A set of ansible scripts to build a personal mail server / private cloud / etc.
  • Ptorx

    3.5 0.0 TypeScript
    📩🛡 Email privacy. Anonymously send and receive with alias forwarding.
  • MailCare

    3.1 0.0 PHP
    [MIRRORING REPOSITORY] See https://gitlab.com/mailcare/mailcare. MailCare is an open source disposable email address services. Accessible via web browser or API to protect your privacy right now.
  • Isotope Mail

    3.1 0.0 JavaScript
    Isotope Mail Client
  • Dada Mail

    3.0 8.0 L3 Perl
    Self-Hosted, Full Featured, Email Mailing List Manager. Announcement + Discussion Lists, Web-based Installer, Installs with minimal dependencies, sendmail/SMTP/Amazon SES supported
  • Inboxen

    3.0 0.0 Python
    Main repo for Inboxen.org
  • Slimta

    3.0 1.0 L5 Python
    Python libraries to send, receive, and queue email.
  • AnsiMail

    2.5 0.0 Jinja
    Fullstack, security focused, personal mail server based on OpenSMTPD for OpenBSD
  • Courier MTA

    1.9 7.6 L1 C
    Courier Mail Server
  • Piler

    1.1 -
    feature rich open source email archiving solution.
  • iRedMail

    1.1 -
    Full-featured mail server solution based on Postfix and Dovecot.
  • Lightmeter

    1.0 0.0
    Lightmeter uses GitLab, not GitHub -- find repos at: https://gitlab.com/lightmeter
  • Qmail

    1.0 0.0
    Bind to different local ip addresses depending on the domain part of the sender argument when using `qmail-remote`.
  • Simple NixOS Mailserver

    -
    A complete mailserver solution leveraging the Nix Ecosystem.
  • Qmailtoaster

    -
    Stable, full-featured, easy-to-install mail server based on qmail.
  • IMP

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    HORDE application that provides webmail access to IMAP and POP3 accounts.
  • Schleuder

    -
    A GPG-enabled mailing list manager with resending-capabilities.
  • Postfix

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    Fast, easy to administer, and secure Sendmail replacement.
  • SquirrelMail

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    Another browser-based IMAP client.
  • HyperKitty

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    Open source Django application to provide a web interface to access GNU Mailman v3 archives.
  • Postorius

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    Web user interface to access GNU Mailman.
  • Sendmail

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    Message transfer agent
  • Cyrus IMAP/POP3

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    Intended to be run on sealed servers, where normal users are not permitted to log in.
  • Citadel

    -
    Feature packed, easy, versatile, and powerful mail server, thanks to exclusive "rooms" based architecture.
  • Sympa

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    A mailing list manager.
  • chasquid

    -
    SMTP

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