Modify Content Settings: Forwarding Off
Forwarding Off: Located to the right of the Recall All option, under Delivery Details, the Forwarding Off* feature disables the Secure Forward option and removes the forward field from the landing page.
*Please Note: The Forwarding Off option is applied at the delivery level and affects all recipients.
See Also: Content Settings: Allow Forwarding | Preferences: Allow Forward | Receive: Secure Forward