Darryl is right on this one. I've known ever since I was a little kid it was illegal to mess with other peoples mailbox. It is illegal to put anything on the mailbox or the pole.
Ryan, if I were you I would go with doorhangers. PM if you would like a good deal on some.
2002 Ford F-150
52" Commercial Gravely 152 Zero Turn w 27 hp Kohler
36" Commercial Gravely Zero Turn w 18 hp Kawisaki
T270 Shindaiwa Trimmer
M242 Shindaiwa Multi Use with pole saw & hedge trimmer
Echo PB620 BP Blower
EB 630 Shindaiwa BP Blower
14' Tandem Axle Trailer with racks