OSS Discovery

US
United States
COMMUNICATION & SOCIAL
SELF-HOSTABLE
ACTIVELY MAINTAINED
FREE
Mail-in-a-Box

MAIL-IN-A-BOX

"Mail-in-a-Box is a secure email server installer and manager. It simplifies complex email infrastructure, providing a robust solution for individuals and organizations. Built on a Linux foundation, it integrates Postfix, Dovecot, and SpamAssassin, ensuring seamless email management and top-notch security for users worldwide, with easy setup and maintenance."

GITHUB STARS
15k
+12% this month
FORKS
1.5k
Active community
LAST PUSH
Apr 24, 2026
High momentum
WATCHERS
279
Tracking updates
LICENSE
CC0-1.0
Commercial use
**Mail-in-a-Box** is a mail server installer and manager that simplifies email infrastructure. It is built for individuals and organizations who need to manage email services. It runs on a Linux foundation, integrating Postfix, Dovecot, and SpamAssassin.

High Performance

Built for speed and minimal overhead.

Self-hostable

Docker, Kubernetes, or bare metal

Developer Native

Programmable via any language workflow

SUPPORTED LANGUAGES

Python
Python
Shell
Shell
HTML
HTML
PHP
PHP
Handlebars
Handlebars

VISUAL INTERFACE

Screenshot 1
Screenshot 2
Screenshot 3

The Quick Glance

Status
Active
Category
Communication & Social
Pricing
Free
Self-Hosted
Yes
Available on
Windows
macOS
Linux
Latest Release
v75
Apr 20, 2026

Relative Standing — across 1,284 tools

STARS15k
Top 25% globally
FORKS1.5k
Top 25% in Open Source
ACTIVITYModerate
Top 52% Activity
WATCHERS279
Top 13% Community