Home All Salsbury Vertical Mailbox - 3 Doors - Aluminum ...
🚚 Free Shipping $50+
🔒 Secure Checkout
↩️ Easy Returns
Satisfaction Guaranteed

Salsbury Vertical Mailbox - 3 Doors - Aluminum - Surface Mounted - USPS Access - 3503ASU

★★★★★
2 Reviews ✓ Verified Buyers
⚖️ 25.0 lb
$375.00
$387.00
SAVE 3%
Free shipping to lower 48 states · Tax calculated at checkout
🔥 Loading...
⚠️ Only 10 left in stock — order soon
📦
⚡ Buy it Now

Upgrade your mail delivery system with the Salsbury Industries, a surface-mounted 3 door vertical mailbox built for convenience and security. we specialize in top-tier mailboxes and lockers, and this Salsbury offering is a perfect choice for apartments, condominiums, and commercial buildings.

USPS Approved for Secure Delivery

The 3503ASU is officially approved by the United States Postal Service (USPS) and adheres to strict USPS-STD-4B+ specifications. This ensures your mailboxes meet federal regulations for safe and secure mail delivery by your postal carrier.

Durable Aluminum Construction for Lasting Use

Built entirely from aluminum, the 3503ASU is designed to withstand the elements and daily use. The powder-coated finish comes in a variety of colors (aluminum, brass, bronze, sandstone, and green) to complement your building's aesthetics. Plus, the doors and trim feature a striated design that resists scratches and maintains a polished look.

Individual Compartments for Organized Mail Delivery

This mailbox boasts three individual compartments, each with ample space to accommodate standard-sized envelopes, magazines, and small packages. The individual compartments (5-1/2" W x 16-1/4" H x 6-3/4" D) provide residents or tenants with a secure space for their mail, reducing the risk of mailbox theft or misdelivery.

Easy Installation and Access Control

The 3 Door Mailbox is surface-mounted, meaning it installs directly onto a wall using mounting hardware (not included). This simplifies installation for both new construction and retrofitting existing mail delivery systems. Each compartment features a 5-pin cylinder cam lock with two keys, providing residents with secure access to their mail.

Features:

USPS Approved (STD-4B+)

Durable Aluminum Construction

Weather-Resistant Powder-coated Finish (Multiple Colors)

Three Individual Compartments

Five-Pin Cylinder Locks with Two Keys per Compartment

Integrated Label Holders

Surface-Mounted Design for Easy Installation

Specifications
Assembled Depth (in.) 7.5 in
Width (in.) 35.25 in
Height (in.) 19 in
Assembly Required Yes
Color Bronze
Material Aluminum
Product Weight (lb.) 40 lb
Included Keys, Name Card Holders
Mount Type Wall Mount
Security Locking
Corrosion Resistant Yes
Warranty / Certifications Three Year
Manufacturer Warranty U.S. Postmaster General Approved

Buy  Yoder's Canned Premium Variety Pack

Free shipping on all orders over $50 to the lower 48 states
Ships within 1–2 business days
Easy returns — contact us within 30 days of delivery
Secure checkout with all major cards, PayPal, Shop Pay
Salsbury Vertical Mailbox - 3 Doors - Aluminum - Surface Mounted - USPS Access - 3503ASU
Salsbury Vertical Mailbox - 3 Doors - Alum...
$375.00

Frequently Asked Questions

How long will the aluminum on the Salsbury 3503ASU mailbox last before it rusts or deteriorates?

The aluminum construction is highly durable and corrosion-resistant, making it suitable for long-term outdoor use without rusting. With proper maintenance, you can expect many years of reliable service in most weather conditions.

Can the Salsbury 3 Door Vertical Mailbox be installed on any type of surface?

The 3503ASU is designed for surface mounting, which means it attaches directly to walls, posts, or other flat surfaces. Installation location should be secure and accessible for both residents and USPS carriers.

Is the Salsbury 3503ASU suitable for apartment buildings and multi-unit properties?

Yes, this mailbox is specifically designed for apartments, condominiums, and commercial buildings where multiple tenants need individual mail compartments. The 3-door configuration allows separate mail collection for up to 3 units.

Does the Salsbury 3503ASU come with locks on each door?

Yes, each of the 3 doors includes individual locks to secure mail and prevent unauthorized access, providing tenant privacy and package security. USPS carriers have master key access for mail delivery.

What's the difference between surface-mounted and recessed installation, and why is the 3503ASU surface-mounted?

Surface-mounted mailboxes like the 3503ASU attach to the outside of walls or posts and are easier to install without requiring structural modifications or cutting into surfaces. They're ideal for buildings where recessed installation isn't possible or practical.