docker-mailserver vs Mail-in-a-Box
| Tagline | Production-ready, config-driven mail server in a single container | Turn any Ubuntu VPS into a complete, self-hosted mail server in one command |
| Category | Email & Newsletters | Email & Newsletters |
| Replaces | Gmail / Google Workspace | Gmail / Google Workspace, Mailchimp, SendGrid |
| GitHub stars | 18k | 15k |
| Language | Shell | Shell |
| License | MIT | CC0-1.0 |
| Self-host difficulty | 4/5 Involved | 2/5 Easy |
| Deploy options | Docker Docker Compose Manual | Manual |
| Managed hosting | ||
| Last updated | 8 days ago | 25 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
docker-mailserver
- No admin web UI — all config is via files and the CLI
- No bundled webmail or groupware (calendar/contacts)
- Deliverability, DNS, and TLS setup are entirely your responsibility
- Not a newsletter/marketing tool — mailboxes only
Mail-in-a-Box
- Requires a dedicated Ubuntu VPS with a clean IP reputation; shared hosting is not supported
- No built-in bulk mailing or newsletter campaign tools
- Limited horizontal scalability; single-server architecture only
- Webmail (Roundcube) is functional but far less polished than Gmail's UI
Bottom line
Choose Mail-in-a-Box if you want the lower-effort setup; choose docker-mailserver for the larger community and ecosystem. docker-mailserver has seen more recent development. Open each guide below for deploy steps and the full feature gap.
docker-mailserver
Production-ready, config-driven mail server in a single container
Mail-in-a-Box
Turn any Ubuntu VPS into a complete, self-hosted mail server in one command