Open Source Mail-in-a-box Alternatives
The best open source alternative to Mail-in-a-box is Cloudron. If that doesn't suit you, our users have ranked more than 10 alternatives to Mail-in-a-box and 12 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Mail-in-a-box are mailcow: dockerized, Postfix, iRedMail and hMail Server.
Mail-in-a-box alternatives are mainly Mail Servers but may also be Server Management Tools or Web Hosting Services. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Mail-in-a-box.
- Freemium • Open Source
- Linux
- Online
- Self-Hosted
Cloudron is a complete solution for managing apps & users on your own server. Easily deploy production ready apps from the app library and keep them automatically up-to-date. It even comes with a built-in email server and web clients!.
Cloudron vs Mail-in-a-box opinions
it looks like a full on web control panel for hosting not e-mail specific..
I didn't really realize I already had a full blown email solution when I installed Cloudron initially. Everything was already setup and ready to go!
Not a email server solution
Cloudron is not an email server solution
- Free • Open Source
- Linux
- Self-Hosted
mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail. It attempts to be fast, easy to administer, and secure. The software is also known by its former names VMailer and IBM Secure Mailer.
A fully fledged, free email server solution, an open source project (GPL v2).
- Free • Open Source
- Windows
hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.
Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
- Free • Open Source
- Linux
- Self-Hosted
Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface. It provides useful components such as an administration panel or a webmail.
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Mailu is a simple yet full-featured mail server as a set of Docker images. It is free software (both as in free beer and as in free speech), open to suggestions and external contributions.
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The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework.
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