Communication
Self-Hosted Email Server
Self-hosted mail server stacks for deploying and managing SMTP, IMAP, webmail, DNS, and related email infrastructure.
Best Self-Hosted Email Server tools by public signals
These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.
Use Case Rankings
Ordered by ToolVitals score, health, shipping, confidence, and then adoption as a tie-breaker.
| # | Tool | Health | Shipping | Openness | Stars | Score | Status |
|---|---|---|---|---|---|---|---|
| 01 | gromox Groupware backend supporting mail and calendar protocols. | 73 | 75 | OSI-approved OSS | 241 | 79 | Warning |
| 02 | Mail-in-a-Box Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box. | 74 | 36 | License unknown | 15.3k | 67 | Warning |