Mail-in-a-Box

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Mail-in-a-Box
Original authorJoshua Tauberer
Initial releaseAugust 2013; 12 years ago (2013-08)
Stable release
v73 / 11 July 2025; 12 months ago (2025-07-11)
Repositorygithub.com/mail-in-a-box/mailinabox/
Written inPython
Engine
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    Operating systemUbuntu Server 22.04
    Available inEnglish
    TypeEmail service
    LicenseCC0
    Websitemailinabox.email

    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]

    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]

    References

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