From Wikipedia, the free encyclopedia
Original author(s)Joshua Tauberer
Initial releaseAugust 2013; 10 years ago (2013-08)
Stable release
v65 / 27 October 2023; 4 months ago (2023-10-27)
Written inPython
Operating systemUbuntu Server 22.04
Available inEnglish
TypeEmail service

Mail-in-a-Box is a free and open-source program for mail server hosting developed by Joshua Tauberer.[1][2] The software's goal is to enable any user to turn a cloud system into a mail server in few hours.[3] The tool enables developers to host mail for multiple users and multiple domain names.[4][5]

The default configuration provides a spam detection system, monitoring, reporting and backup mechanisms.[6] It can also set up and automatically renew a Let's Encrypt certificate, as well as configuring the detailed DNS configurations needed to ensure that a mail server's IP address is trusted by other servers, and less likely to be blacklisted.[6][7] Its support for IMAP/SMTP facilitates synchronizing across devices.[7]

First developed in 2013 by Tauberer, the tool is written in Python. The project supports Ubuntu LTS.[8][9]

It has been recommended by the notable Hackaday and MakeTechEasier.[10][11]


  1. ^ "The G2 on Mail-in-a-box". G2. Retrieved 2020-08-09.
  2. ^ finid (2015-05-15). "How To Run Your Own Mail Server with Mail-in-a-Box on Ubuntu 14.04". DigitalOcean. Retrieved 2020-08-09.
  3. ^ SK. "Mail-in-a-Box: An Open Source Mail Server Solution | Unixmen". Retrieved 2020-08-09.
  4. ^ "Mail-in-a-Box email". Discourse Meta. 2018-01-07. Retrieved 2020-08-09.
  5. ^ Misle, Faisal (2019-10-31). "How to Create an Email Server with Mail-in-a-Box". Linode Guides & Tutorials. Retrieved 2020-08-09.
  6. ^ a b "How to Install Mail-in-a-box on Ubuntu 18.04". Vultr. 2019-03-15. Retrieved 2020-08-09.
  7. ^ a b "Free Software To Use As Email Service Provider". Containerize. Retrieved 2023-04-16.
  8. ^ "Release v0.60 · mail-in-a-box/mailinabox". GitHub. Retrieved 2022-09-24.
  9. ^ ". · Issue #1819 · mail-in-a-box/Mailinabox". GitHub.
  10. ^ By (2021-06-05). "Wreck Your Mail Before You Check Your Mail". Hackaday. Retrieved 2023-10-11.
  11. ^ Red, Ramces (2023-02-28). "How to Create an Email Server in Linux with Mail-In-A-Box". Make Tech Easier. Retrieved 2023-10-11.

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