Docker Mailserver
Mail ServersProduction-ready, config-driven mail server in a container
Replaces Google Workspace, Microsoft 365
Best Encrypted Mail Servers for self-hosting
The 17 best Encrypted mail servers you can self-host, ranked by community traction.
Mail-in-a-Box
Mail ServersTurn a fresh server into a working mail server
Replaces Google Workspace, Microsoft 365
mailcow
Mail ServersDockerized full-stack mail server suite
Replaces Microsoft Exchange, Google Workspace
Mailpile
Mail ServersPrivacy-focused, searchable email client
Replaces Gmail
Mailu
Mail ServersSimple yet full-featured Docker mail server
Replaces Google Workspace, Microsoft 365
Maddy Mail Server
Mail ServersComposable, all-in-one mail server in Go
Replaces Google Workspace, Microsoft 365
Mox
Mail ServersModern, secure all-in-one mail server
Replaces Google Workspace, Microsoft 365
Modoboa
Mail ServersMail hosting and management platform with a modern UI
Replaces Google Workspace, cPanel Email
emailwiz
Mail ServersScript to deploy a full Postfix/Dovecot mail server
Replaces Google Workspace
Mailvelope
Mail ServersBrowser extension for OpenPGP encryption in webmail
Replaces ProtonMail
iRedMail
Mail ServersFree, full-featured mail server solution
Replaces Microsoft Exchange, Google Workspace
Dovecot
Mail ServersSecure, high-performance IMAP and POP3 server
Replaces Microsoft Exchange
chasquid
Mail ServersSimple, easy-to-configure SMTP server
Replaces Google Workspace
OpenSMTPD
Mail ServersSecure and simple SMTP server from OpenBSD
Replaces Sendmail, Postfix
Postfix
Mail ServersFast, secure and reliable mail transfer agent
Replaces Microsoft Exchange
piler
Mail ServersEmail archiving system with full-text search
Replaces Mimecast, Barracuda Archiver
Schleuder
Mail ServersEncrypting mailing list manager with OpenPGP
Replaces Google Groups
No apps match these filters.
At a glance
| App | Deploy effort | Difficulty | Min. RAM | License | ★ Stars |
|---|---|---|---|---|---|
| Docker Mailserver | ≈5-minute setup | Medium | 2,048 MB | MIT | 19,533 |
| Mail-in-a-Box | ≈5-minute setup | Easy | 1,024 MB | CC0-1.0 | 15,438 |
| mailcow | Under-an-hour setup | Medium | 6,144 MB | GPL-3.0 | 13,610 |
| Mailpile | Read-the-docs project | Medium | 512 MB | AGPL-3.0 | 8,811 |
| Mailu | Under-an-hour setup | Medium | 2,048 MB | MIT | 7,551 |
| Maddy Mail Server | Under-an-hour setup | Medium | 256 MB | GPL-3.0 | 6,108 |
| Mox | Under-an-hour setup | Easy | 256 MB | MIT | 5,895 |
| Modoboa | Under-an-hour setup | Medium | 2,048 MB | ISC | 3,542 |
| emailwiz | Read-the-docs project | Medium | 1,024 MB | GPL-3.0 | 2,168 |
| Mailvelope | Read-the-docs project | Medium | 128 MB | AGPL-3.0 | 1,847 |
Quick picks
- Most adopted: Docker Mailserver (19,533 GitHub stars).
- Lightest footprint: OpenSMTPD (from 32 MB RAM, against 6,144 MB for the heaviest here).
- Fastest to deploy: Docker Mailserver (verified single-container compose).
- Licensing: 6 of 17 use GPL-3.0; check the rest individually if you plan to modify and redistribute.
Every option here is open-source and self-hostable, tagged Encrypted within the mail servers category. Deploy effort is graded from published container recipes, not vendor claims — see the methodology.