My buddy lives down the road from me in the middle of nowhere had the same problem. His solution was a cut off railroad rail, set in 12 inches of concrete, a 1/4 inch steel plate custom made mailbox. now heres the kicker, he buried wires to it, hooked up an electric fence transformer to a timer that turned on at night (so not to shock his mailman). He has not had an issue since and actually had someone sideswipe the box a few months back, did about $1800 worth of damage to the kids car and the kid got in trouble since it turns out he was running down mailbox's elsewhere! I will take some pics when I get a chance...
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Chris
As close to "Normal" as I can get...
