Release 6.20.4: Introduced property to disable translation if mail default folders (if a custom name has been set)

[changerequest]

Introduced property to disable translation if mail default folders (if a custom name has been set).

Property com.openexchange.mail.translateDefaultFolders has been added to file 'mail.properties'. If set to 'true' (default) translation is always performed according to .po files.

If set to 'false' AND name differs from pre-defined name (e.g. My