Can I send a letterbox parcel abroad? No, letterbox parcels can only be sent to destinations in the Netherlands. Gerelateerde vragen Each letterbox parcel has a Track & Trace code, but I can’t fully track my parcel. What do I do? Do the maximum allowed dimensions of parcels that I want to have collected by the Collection Service differ from the standard maximum parcel dimensions? Why can’t missing letterbox parcels be investigated? What happens if a DHL mailbox package gets damaged in Belgium? What are the rates for a DHL mailbox package to Belgium?