Look for boxes made from 12- to 16-gauge galvanized steel , which provides significant resistance to blunt-force vandalism and environmental wear. Understanding USPS Requirements Mail Boss Locking Security Mailboxes Bundle - Amazon.com

High-quality locking mailboxes, such as those from Mail Boss or Lowe's , typically include several specialized mechanisms to prevent unauthorized access:

An internal shield or hopper-style door allows mail to be dropped in but blocks hands or tools from "fishing" it back out through the slot.

Protecting your mail is about more than just keeping letters dry; it’s about safeguarding your identity from theft and your property from vandalism. Locking security mailboxes provide a fortified first line of defense with features that balance high-level security with ease of use for both you and your mail carrier.

These patented systems use a hooked latch to prevent thieves from prying the door open with a screwdriver or crowbar.