As a rural mail carrier associate (one or two days a week until I get picked up full time).....PLEASE don't booby-trap your mailboxes with bees or big rocks, and other nasty stuff like that.
You can't do anything to the approach for your mailbox that would hinder/prevent the carrier from delivering your mail. If you do put large rocks, deep chuck holes, etc in the way...the carrier does NOT have to deliver your mail, and you will have to drive in to the Post Office to pick it up yourself.
The best ones I have seen over the last few months of delivering mail, the one mentioned about the large metal pipe with the mailbox inside seems about the sturdiest, without going to the expense of building a brick/stone enclosure for the box.
You could try checking with your local Postmaster, they may know of someone local that could build you a nice sturdy box that would work.
I copied this off the USPS website..took a bit to find, hope it helps.
(oh, if you tend to get a lot of packages, keep that in mind when you are trying to decide how big of a replacement box to get! Thanks!)
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Postal Policies for Curbside Mailboxes?
Installation of curbside mailboxes must meet specific construction standards, which can be obtained from the local Post Office™ facility. For United States Postal Service STD-7, Mailboxes, City and Rural Curbside you may write to:
Delivery & Customer SVCS Equipment, Engineering, US Postal Service
8403 Lee HWY
Merrifield VA 22082-8101
The following are a few of the federal regulations that apply when installing a curbside mailbox:
* Important: Before installing, moving or replacing your mailbox or mailbox support, you will need to contact your local Post Office.
* All mailboxes must be approved by the United States Postal Service®.
* Custom made mailboxes will be approved by the Postmaster if they meet established standards.
* Name put on box should be at least one inch high.
* Private mailbox located near the street next to a curb.
* Generally, the boxes should be installed with the bottom of the box at a vertical height of between 3.5 and 4 feet from the road surface.
o Because of varying road and curb conditions and other factors, you should contact the postmaster or mailperson before setting up or replacing your mailboxes and supports
* A mailbox with a lock must have a slot large enough to accommodate customer's daily mail volume.
* Advertising on a mailbox or the supporting post of the mailbox is prohibited.