How to Enable HSTS in MDaemon

The following line needs to be added to the [ResponseHeaders] section of the \MDaemon\WorldClient\WorldClient.ini and \MDaemon\WebAdmin\WebAdmin.ini files:

Strict-Transport-Security=max-age=31536000

The Webmail and Remote Administration servers must then be restarted via Setup -> Web + IM Services (alternatively restart MDaemon to apply the change).

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