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Best Encrypted Mail Servers for self-hosting

The 17 best Encrypted mail servers you can self-host, ranked by community traction.

Docker Mailserver

Production-ready, config-driven mail server in a container

Replaces Google Workspace, Microsoft 365

★ 18.9k Medium setup MIT

Mail-in-a-Box

Turn a fresh server into a working mail server

Replaces Google Workspace, Microsoft 365

★ 15.4k Easy setup CC0-1.0

mailcow

Dockerized full-stack mail server suite

Replaces Microsoft Exchange, Google Workspace

★ 13.5k Medium setup GPL-3.0

Mailpile

Privacy-focused, searchable email client

Replaces Gmail

★ 8.8k Medium setup AGPL-3.0

Mailu

Simple yet full-featured Docker mail server

Replaces Google Workspace, Microsoft 365

★ 7.5k Medium setup MIT

Maddy Mail Server

Composable, all-in-one mail server in Go

Replaces Google Workspace, Microsoft 365

★ 6.1k Medium setup GPL-3.0

Mox

Modern, secure all-in-one mail server

Replaces Google Workspace, Microsoft 365

★ 5.9k Easy setup MIT

Modoboa

Mail hosting and management platform with a modern UI

Replaces Google Workspace, cPanel Email

★ 3.5k Medium setup ISC

emailwiz

Script to deploy a full Postfix/Dovecot mail server

Replaces Google Workspace

★ 2.2k Medium setup GPL-3.0

iRedMail

Free, full-featured mail server solution

Replaces Microsoft Exchange, Google Workspace

★ 1.8k Medium setup GPL-3.0

Mailvelope

Browser extension for OpenPGP encryption in webmail

Replaces ProtonMail

★ 1.8k Medium setup AGPL-3.0

Dovecot

Secure, high-performance IMAP and POP3 server

Replaces Microsoft Exchange

★ 1.3k Hard setup MIT

chasquid

Simple, easy-to-configure SMTP server

Replaces Google Workspace

★ 977 Medium setup Apache-2.0

OpenSMTPD

Secure and simple SMTP server from OpenBSD

Replaces Sendmail, Postfix

★ 586 Medium setup ISC

Postfix

Fast, secure and reliable mail transfer agent

Replaces Microsoft Exchange

★ 576 Hard setup IPL-1.0

piler

Email archiving system with full-text search

Replaces Mimecast, Barracuda Archiver

★ 200 Hard setup GPL-3.0

Schleuder

Encrypting mailing list manager with OpenPGP

Replaces Google Groups

★ 100 Hard setup GPL-3.0

Every option here is open-source and self-hostable, tagged Encrypted within the mail servers category. Compare them on the individual app pages for setup difficulty and resource requirements.