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
7,088
License
GPL-3.0
Last commit
3 days ago
TypeScriptActive
Plunk logo

Plunk

Self-hosted email platform powered by AWS SES

Stars
4,686
License
AGPL-3.0
Last commit
3 days ago
TypeScriptActive
useSend logo

useSend

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

Stars
3,310
License
AGPL-3.0
Last commit
5 days ago
TypeScriptActive
Haraka logo

Haraka

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

Stars
5,485
License
MIT
Last commit
5 days ago
JavaScriptActive
Mailu logo

Mailu

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

Stars
6,938
License
Unknown
Last commit
15 days ago
PythonActive
Maddy logo

Maddy

Composable all-in-one mail server replacing multiple daemons

Stars
5,755
License
GPL-3.0
Last commit
16 days ago
GoActive
Zero logo

Zero

Self-hosted AI-enhanced email client with unified inbox

Stars
10,174
License
MIT
Last commit
3 months ago
TypeScriptActive
Mail-in-a-Box logo

Mail-in-a-Box

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

Stars
15,064
License
CC0-1.0
Last commit
4 months ago
PythonStable
Go-Guerrilla logo

Go-Guerrilla

Lightweight SMTP server for high-volume email reception in Go

Stars
2,916
License
MIT
Last commit
1 year ago
GoDormant