All-in-One Mail Servers
Mailcow
Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.- Source Code: GitHub
- License: GPL-3.0
- Tech Stack: Docker, PHP
Mail-in-a-Box
Turns any Ubuntu server into a fully functional mail server with one command.- Source Code: GitHub
- License: CC0-1.0
- Tech Stack: Shell
docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only configuration files, no SQL database.- Source Code: GitHub
- License: MIT
- Tech Stack: Docker
Mailu
Simple yet full-featured mail server as a set of Docker images.- Source Code: GitHub
- License: MIT
- Tech Stack: Docker, Python
iRedMail
Full-featured mail server solution based on Postfix and Dovecot.- Source Code: GitHub
- License: GPL-3.0
- Tech Stack: Shell
Maddy Mail Server
All-in-one mail server that implements SMTP (both MTA and MX) and IMAP. Replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC with single daemon.- Source Code: GitHub
- License: GPL-3.0
- Tech Stack: Go
Mox
Complete e-mail solution with IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS with ACME and Let’s Encrypt, account autoconfiguration, and webmail.- Source Code: GitHub
- License: MIT
- Tech Stack: Go
Stalwart Mail Server
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.- Source Code: GitHub
- License: AGPL-3.0
- Tech Stack: Rust, Docker
Postal
Complete and fully featured mail server for use by websites & web servers.- Source Code: GitHub
- License: MIT
- Tech Stack: Docker, Ruby
Modoboa
Mail hosting and management platform including a modern and simplified web user interface.- Source Code: GitHub
- License: ISC
- Tech Stack: Python
wildduck
Scalable no-SPOF IMAP/POP3 mail server.- Source Code: GitHub
- License: EUPL-1.2
- Tech Stack: Nodejs, Docker
Email Alias & Forwarding Services
AnonAddy
Email forwarding service for creating aliases.- Source Code: GitHub
- License: MIT
- Tech Stack: PHP, Docker
SimpleLogin
Open source email alias solution to protect your email address. Comes with browser extensions and mobile apps.- Source Code: GitHub
- License: MIT
- Tech Stack: Docker, Python
Inboxen
Lets you have an infinite number of unique inboxes.- Source Code: Codeberg
- License: GPL-3.0
- Tech Stack: Python
Webspace-Based Solutions
b1gMail
Complete email solution that runs on any webspace with PHP and MariaDB. It supports POP3 catchall mailboxes and can also integrate with Postfix or b1gMailServer if you’re running your own server.Automated Setup Scripts
emailwiz
Luke Smith’s bash script to completely automate the setup of a Postfix/Dovecot/SpamAssassin/OpenDKIM server on debian.- Source Code: GitHub
- License: GPL-3.0
- Tech Stack: Shell
DebOps
Your Debian-based data center in a box. A set of general-purpose Ansible roles that can be used to manage Debian or Ubuntu hosts.- Source Code: GitHub
- License: GPL-3.0
- Tech Stack: Ansible, Python
Lightweight Solutions
Dovel
SMTP server that sends and receives emails according to a simple configuration file, with an optional web interface that you can use to browse your emails.- Source Code: dovel.email
- License: LGPL-3.0
- Tech Stack: Go
Specialized Distributions
Simple NixOS Mailserver
Complete mailserver solution leveraging the Nix Ecosystem.- Source Code: GitLab
- License: GPL-3.0
- Tech Stack: Nix