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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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  2. Automation & integration

Automation & integration

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Driving hMailServer from outside the Control Panel: scripts, the COM and REST APIs, Sieve and rules, and metrics and logs shipped elsewhere.

Subcategories

  • VBScript and JScript event handlers, OnAcceptMessage and friends, the COM API and the Import Tool — Windows only. Paste the script and the error it raised.

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  • The REST API behind RestApiPort in hMailServer.ini — tokens and OAuth2, provisioning scripts, and control panels, billing systems and directory syncs that call it.

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  • Sieve (RFC 5228) and ManageSieve, the classic rules engine, global rules, SMTP routes, aliases and distribution lists — sorting and steering mail without code.

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  • Prometheus and OTLP, /livez and /readyz, JSON logs into Elasticsearch, Loki or Splunk, and reading hMailServer's own logs when you are chasing a delivery.

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