IMO,Not an attorney, but former law Enforcement . Working as a Deputy Sheriff, worked with Postal Service Enforcement agents. You don't want to touch a Mail Box, yes you pay for it, but the moment it's put out for use, it becomes Postal Property. They do not allow non postal items to be placed in their boxes. Now, that was 47 years ago, laws change , but I wouldn't risk it. At that time they were very serious about their boxes.
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