hMailServer
The facts below are what the maker publishes about hMailServer, checked and dated. Our editors have not written about it yet.
Plans and prices
From hMailServer's own pricing page, checked 12 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| hMailServer | Free | Free and open source under AGPL-3.0 · no per-mailbox fees · no paid tiers |
The facts
Each one read from hMailServer's own pages, with the date it was checked.
What it does
- Databases
- Windows supports SQL Server Compact, MySQL or MariaDB, Microsoft SQL Server and PostgreSQL; Linux supports PostgreSQL and MySQL or MariaDB.checked 12 Oct 2026
- Directories and calendars
- It serves account address books over CardDAV and calendars over CalDAV when the web services HTTPS listener is enabled.checked 12 Oct 2026
- Download verification
- The FAQ says release files have Sigstore bundles, Linux SHA-256 checksums and Windows Authenticode signature verification instructions.checked 12 Oct 2026
- Email authentication
- It supports SPF, DKIM, DMARC, MTA-STS, DANE, ARC sealing and TLS reporting.checked 12 Oct 2026
- Intended users
- The documentation suggests hMailServer for small businesses, developers needing an SMTP and IMAP test endpoint, and hosting providers.checked 12 Oct 2026
- Mail protocols
- It serves mail to clients such as Outlook, Thunderbird and Apple Mail, or through its built-in webmail.checked 12 Oct 2026
- Not an Exchange replacement
- The FAQ says hMailServer has no Teams integration or ActiveSync and is not a replacement for Microsoft Exchange.checked 12 Oct 2026
- Purpose
- hMailServer is a self-hosted mail server that supports SMTP, IMAP and POP3.checked 12 Oct 2026
- REST API
- The REST API is available on Windows and Linux but is off by default; it requires a TLS certificate and key to bind beyond loopback.checked 12 Oct 2026
- Security updates
- The FAQ says release 6.3.6 fixes security flaws found in earlier versions and that the 6.3 line receives security fixes until 30 September 2027.checked 12 Oct 2026
- Spam and virus filtering
- It provides spam filtering, virus scanning through ClamAV, a rules engine and Sieve filtering.checked 12 Oct 2026
- Support
- Free help is available on the community forum, where answers are not gated behind a support plan.checked 12 Oct 2026
- Webmail
- It includes built-in webmail at `/portal` on Windows and Linux, enabled through the REST API listener.checked 12 Oct 2026
Where it runs
- Linux limitations
- Linux has no Control Panel, COM API or Microsoft SQL Server support, and moving an existing Windows installation to Linux is not a supported migration.checked 12 Oct 2026
Alternatives to hMailServer
- 1
mailcow
Free planAndroidiOSWebLinux7.4From €8.90 a month - 2
MailEnable
Free planAndroidiOSWebSelf-hosted7.4$395 one-time - 3
SmarterMail
Free planAndroidiOSWebLinux7.4From $500 a year ($41.67 a month) - 4
Stalwart Mail Server
Free planWebAPILinuxmacOS7.1From $1.09 a year ($0.09 a month) - 5
IceWarp
AndroidiOSWebAPI7.0From $1.35 a month - 6
Axigen
Free planAndroidiOSWebAPI6.9Free plan