hMailServer 6.3.3 — signed 15 September 2026, Windows and Linux, database schema 6040, and a drop-in upgrade from any 5.x install.Download 6.3.3 Documentation

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hMailServer Community

The community support forum for hMailServer — the free, open-source mail server for Windows and Linux — maintained by Progressive Robot Ltd. The software is AGPL-3.0 and stays that way; this is where it is discussed, debugged and documented.

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