Mail-in-a-Box
Open Source software for mail server hosting
From Wikipedia, the free encyclopedia
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 a few hours.[3] The tool enables developers to host mail for multiple users and multiple domain names.[4][5]
| Mail-in-a-Box | |
|---|---|
| Original author | Joshua Tauberer |
| Initial release | August 2013 |
| Stable release | v73
/ 11 July 2025 |
| Written in | Python |
| Operating system | Ubuntu Server 22.04 |
| Available in | English |
| Type | Email service |
| License | CC0 |
| Website | mailinabox |
| Repository | github |
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 and Bash. The project supports Ubuntu LTS.[8][9]
It has been recommended by the notable Hackaday and MakeTechEasier.[10][11]
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