Inclusion list for low file types

This policy setting allows you to configure the list of low-risk file types. If the attachment is in the list of low-risk file types, Windows will not prompt the user before accessing the file, regardless of the file's zone information. This inclusion list overrides the list of high-risk file types built into Windows and has a lower precedence than the high-risk or medium-risk inclusion lists (where an extension is listed in more than one inclusion list).

If you enable this policy setting, you can specify file types that pose a low risk.

If you disable this policy setting, Windows uses its default trust logic.

If you do not configure this policy setting, Windows uses its default trust logic.

Supported on: At least Windows XP Professional with SP2
Specify low risk extensions (include a leading period, e.g. .bmp;.gif;).

Registry HiveHKEY_CURRENT_USER
Registry PathSoftware\Microsoft\Windows\CurrentVersion\Policies\Associations
Value NameLowRiskFileTypes
Value TypeREG_SZ
Default Value

attachmentmanager.admx

Administrative Templates (Computers)

Administrative Templates (Users)