have a long uphill driveway(200'+) and need a way to tell when the mail has
been delivered to cut down on trips to an empty box.
Rubbermaid has a mialbox with a pop up flag on the side. At that distance
you may need binoculars to see it. Mine is visible, but I'm only 75 feet or
so. There are add on things like that also. I've heard of a wireless alarm
setup also, that goes off when the door is pulled open.