Open Source Mail-in-a-box Alternatives

The best open source alternative to Mail-in-a-box is mailcow: dockerized. If that doesn't suit you, our users have ranked more than 10 alternatives to Mail-in-a-box and 11 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Mail-in-a-box are Postfix, hMail Server, iRedMail and Mailu.

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.

Mail-in-a-box alternatives page was last updated

Mail-in-a-box

Free • Open Source
Mail Server

Easy-to-deploy mail server.

More about Mail-in-a-box

mailcow: dockerized
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
WebMail Provider
Linux
Self-Hosted
18 mailcow: dockerized alternatives
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.
- - mailcow: dockerized is the most popular Linux & Self-Hosted alternative to Mail-in-a-box.
- - mailcow: dockerized is the most popular Open Source & free alternative to Mail-in-a-box.
Suggest and vote on features
mailcow: dockerized Features
1. Dark Modemailcow: dockerized supports dark mode for comfortable usage in low light conditions.
2. Ad-freemailcow: dockerized doesn't contain any form of external advertising.
3. Two-factor Authenticationmailcow: dockerized supports two-factor authentication (2FA).
4. Mail Filteringmailcow: dockerized classifies email messages according to specified criteria, allowing you to automatically recognize fraudulent or spam messages.
5. Email Organizermailcow: dockerized allows you to take control of your inbox by filtering and control tools.
6. Spam Filtermailcow: dockerized can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
7. Support for Aliasesmailcow: dockerized supports aliases, so you can receive email without exposing your main email address
Self hosted mail
Support for Docker
ActiveSync
Modular System
Dockerized
Opinions about mailcow: dockerized as a Alternative to Mail-in-a-box
Most users think mailcow: dockerized is a great Mail-in-a-box alternative.
Postfix
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
24 Postfix alternatives
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.
- - Postfix is the most popular Mac alternative to Mail-in-a-box.
Postfix has no features, suggest some!
hMail Server
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Windows
23 hMail Server alternatives
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.
- - hMail Server is the most popular Windows alternative to Mail-in-a-box.
Suggest and vote on features
hMail Server Features
IMAP Support
Convert images to PDF
SMTP Support
POP3 Support
Discontinued
hMail Server is no longer supported by the people who created it and has been discontinued – so use it at your own risk.
iRedMail
Is this is a good alternative?
Yes
No
Freemium • Open Source
Mail Server
Linux
BSD
Self-Hosted
69 iRedMail alternatives
A fully fledged, free email server solution, an open source project (GPL v2).

Use official binary packages from Linux/BSD distributions, with both i386 and x86_64 support.

Easy, fast deployment in LESS THAN 1 MINUTE. View YouTube Video to check how easy it is.

Works on both no.
iRedMail has no features, suggest some!

Opinions about iRedMail as a Alternative to Mail-in-a-box
Most users think iRedMail is a great Mail-in-a-box alternative.
Mailu
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Linux
Self-Hosted
6 Mailu alternatives
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.
Mailu has no features, suggest some!
Add a screenshot
Exim
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
16 Exim alternatives
Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Suggest and vote on features
Exim Features
SMTP Support
Add a screenshot
Modoboa
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Linux
Self-Hosted
12 Modoboa alternatives
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.
Suggest and vote on features
Modoboa Features
1. Multiple Account supportModoboa support multiple accounts without the need to logout and login
2. Calendar ViewModoboa has a built-in calendar view to have a clear overview of your content over time.
3. Ad-freeModoboa doesn't contain any form of external advertising.
4. Support for AliasesModoboa supports aliases, so you can receive email without exposing your main email address
5. Spam FilterModoboa can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
6. Privacy focusedModoboa is considered a privacy friendly alternative.
Email monitoring
Admin panel
Modular System
Add a screenshot
Sendmail
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
26 Sendmail alternatives
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.
Suggest and vote on features
Sendmail Features
SMTP Support
Courier-MTA
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Mac
Linux
BSD
Self-Hosted
11 Courier-MTA alternatives
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.
Suggest and vote on features
Courier-MTA Features
1. Mail FilteringCourier-MTA classifies email messages according to specified criteria, allowing you to automatically recognize fraudulent or spam messages.
SMTP Support
IMAP Support
Add a screenshot
Haraka
Is this is a good alternative?
Yes
No
Free • Open Source
Self-Hosted
Node.JS
6 Haraka alternatives
Haraka is an open source SMTP server written in Node.js which provides extremely high performance coupled with a flexible plugin system allowing Javascript programmers full access to change the behaviour of the server.
Suggest and vote on features
Haraka Features
Support for Javascript
Add a screenshot
WildDuck
Is this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Self-Hosted
6 WildDuck alternatives
WildDuck is a scalable no-SPOF IMAP/POP3 mail server. WildDuck uses a distributed database (sharded + replicated MongoDB) as a backend for storing all data, including emails.
Suggest and vote on features
WildDuck Features
POP3 Support
IMAP Support
Support for Docker