Best Open-source Mail Servers & Relays tools

Explore curated open-source tools in the Mail Servers & Relays category. Compare technologies, see alternatives, and find the right solution for your workflow.

9 projects · Page 1 of 1

Tuta logo

Tuta

Secure email with seamless end-to-end encryption across devices

Stars
7,787
License
GPL-3.0
Last commit
17 hours ago
TypeScriptActive
Mailu logo

Mailu

Fully featured Docker‑based mail server that's simple to deploy

Stars
7,371
License
Last commit
19 hours ago
PythonActive
useSend logo

useSend

Self‑hosted email platform delivering reliable, low‑cost SES mail

Stars
4,514
License
AGPL-3.0
Last commit
20 hours ago
TypeScriptActive
Haraka logo

Haraka

High-performance Node.js SMTP server with modular plugin architecture

Stars
5,607
License
MIT
Last commit
20 hours ago
JavaScriptActive
Maddy logo

Maddy

Composable all-in-one mail server replacing multiple daemons

Stars
6,040
License
GPL-3.0
Last commit
8 days ago
GoActive
Plunk logo

Plunk

Self-hosted email platform powered by AWS SES

Stars
5,280
License
AGPL-3.0
Last commit
10 days ago
TypeScriptActive
Zero logo

Zero

Self-hosted AI-enhanced email client with unified inbox

Stars
10,715
License
MIT
Last commit
1 month ago
TypeScriptActive
Mail-in-a-Box logo

Mail-in-a-Box

One-click, self-hosted email server that just works

Stars
15,369
License
CC0-1.0
Last commit
1 month ago
PythonActive
Go-Guerrilla logo

Go-Guerrilla

Lightweight SMTP server for high-volume email reception in Go

Stars
2,953
License
MIT
Last commit
2 years ago
GoDormant