What is a USPS Approved Mailbox?
A USPS approved mailbox is one that meets the design and performance specifications set by the United States Postal Service (USPS). These mailboxes have been tested and approved for use in mail delivery by the USPS and must comply with specific standards regarding size, durability, accessibility and security. Whether you have a curbside mailbox, wall-mounted mailbox or cluster box unit, it must be on the list of officially approved models or built to comply with USPS guidelines.
How to Know if Your Mailbox is USPS Approved
There are several ways to determine whether your mailbox meets USPS standards:
1. Look for the USPS Marking
Most USPS approved mailboxes will have a label or imprint stating “Approved by the U.S. Postmaster General." This is usually found on the inside of the mailbox door or along the back panel.
2. Check the Manufacturer’s Specifications
Reputable mailbox manufacturers typically note USPS approval in the product description or manual. If you purchased your mailbox from a hardware store or online retailer, check the packaging or product page for compliance information.
3. Refer to the USPS Approved Product List
The USPS maintains a list of approved mailbox manufacturers and models on its official website. If you can’t find markings on your mailbox, search the list to confirm if your model is included.
4. Consult Your Local Post Office
Your local USPS branch can help you determine if your mailbox is compliant. Mail carriers and postal managers are familiar with approved designs and can offer guidance or recommend replacements.
Types of USPS Approved Mailboxes
There are several different types of USPS approved mailboxes, each designed for specific installation needs and delivery volumes.
1. Curbside Mailboxes
These are the most common for residential homes. They are mounted on a post and placed at the edge of the street. Curbside mailboxes must be installed at a height of 41–45 inches from the road surface to the mailbox floor and 6–8 inches from the curb.
There are two main types:
- Non-locking curbside mailboxes. These are basic models without security features.
- Locking curbside mailboxes. These provide an added layer of protection for incoming mail.
2. Wall-Mounted Mailboxes
These are attached directly to the exterior wall of your home, usually near the front door. To be USPS approved, wall-mounted boxes must accommodate standard mail sizes and allow easy access for the mail carrier.
3. Cluster Box Units (CBUs)
Commonly used in apartment complexes, subdivisions, or business parks, CBUs are large mailbox units with multiple compartments. They are USPS approved and often come with parcel lockers for larger deliveries.
4. Parcel Lockers and Package Mailboxes
With the rise of e-commerce, larger USPS approved mailboxes and parcel lockers are becoming more common. These units are designed to securely hold packages and are often used in conjunction with standard mailboxes.
Why USPS Approval Matters
1. Delivery Reliability
If your mailbox isn’t USPS approved, your local mail carrier might refuse to deliver your mail. Mailboxes that don't meet specifications may not accommodate standard mail or packages, making deliveries inefficient or impossible.
2. Mail Security
USPS approved mailboxes are designed with security features that help protect your mail from theft or tampering. Some locking mailboxes even prevent unauthorized access while still allowing USPS carriers to make deliveries.
3. Compliance with Regulations
USPS approval ensures your mailbox follows federal regulations. In some neighborhoods or HOAs, having a compliant mailbox may be a requirement. Installing a non-approved mailbox can result in fines or enforced replacements.
4. Durability and Weather Resistance
Mailboxes approved by the USPS are tested for durability against wind, rain, snow and extreme temperatures. This means fewer maintenance issues and longer service life.
Check Your Mail
Having a USPS approved mailbox is not just a recommendation, it’s a requirement for secure, uninterrupted mail delivery. Whether you're installing a new mailbox or replacing an old one, always verify that it complies with USPS standards. Look for the approval label, consult the USPS website or ask your local post office for guidance.
With so many styles and options available, you can find an approved mailbox that matches your home’s aesthetic while ensuring mail safety and delivery efficiency.