| Email Server | Termux (Non-rooted) | Rooted/Unlocked Android | Notes |
|---|---|---|---|
| Maddy |  Yes | Yes | Best option: full SMTP/IMAP in one binary (Go) |
| Haraka | Yes | Yes | SMTP-only (Node.js). Lightweight and works well |
| Postfix + Dovecot |  Possible | Yes | Traditional stack; harder to configure in Termux |
| Mox | Maybe | Likely | Go-based, untested but promising |
| Exim | Possible | Yes | Complex dependencies; rarely used on mobile |
| Mail-in-a-Box |  No | No | Requires full Ubuntu with systemd |
| Mailcow | No | No | Docker + systemd = not possible on Android |
| Docker Mailserver | No | No | Needs Docker, not supported natively |
| Modoboa | No | No | Complex stack; not portable to Android |
| WildDuck | Partial | Partial | Needs MongoDB, which is unstable on Android |
| Listmonk | Possible | Possible | Needs PostgreSQL; not mobile-friendly |
| Keila | Possible | Possible | Newsletter tool with DB; limited Android use |
| ZoneMTA | Yes | Yes | Node.js-based MTA; usable but config-heavy |
| Forward Email | No | No | DNS-based/cloud service; not hostable on device |
