Postal vs Mail-in-a-Box
A side-by-side comparison of Postal and Mail-in-a-Box — pricing, license, deployment, and where each tool wins.
Postal
docs.postalserver.io
Complete and fully featured mail server for use by websites & web servers.
Mail-in-a-Box
mailinabox.email
Turns any Ubuntu server into a fully functional mail server with one command.
| Feature | Postal | Mail-in-a-Box |
|---|---|---|
| Pricing | Free | Free |
| Model | Open-source | Open-source |
| License | CC-BY-SA-3.0 | CC-BY-SA-3.0 |
| Deployment | Self-hosted, Cloud | Self-hosted |
| Category | Communication - Email - Complete Solutions | Communication - Email - Complete Solutions |
| Self-hosted | ✓Yes | ✓Yes |
| Free tier | ✓Yes | ✓Yes |
Pick Postal if…
- ✓You prefer Postal's feature set or ecosystem fit.
Pick Mail-in-a-Box if…
- ✓You prefer Mail-in-a-Box's feature set or ecosystem fit.