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. | 83 | 89 | OSI-approved OSS | 247 | 88 | Active |
| 02 | Modoboa Mail hosting made simple | 81 | 87 | OSI-approved OSS | 3.5k | 88 | Active |
| 03 | Mailu Self-hosted mail server stack packaged as Docker images. | 85 | 82 | OSI-approved OSS | 7.4k | 86 | Active |
| 04 | KumoMTA The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments. | 77 | 72 | OSI-approved OSS | 511 | 81 | Active |
| 05 | Mox modern full-featured open source secure mail server for low-maintenance self-hosted email | 65 | 35 | OSI-approved OSS | 5.8k | 61 | Warning |
| 06 | 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. | 49 | 20 | License unknown | 15.4k | 52 | Critical |
| 07 | ViMbAdmin Virtual Mailbox Administration | 28 | 0 | OSI-approved OSS | 484 | 29 | Critical |