FAQs Request a Quote Contact
EMPTY

Commercial Mailboxes for USPS Delivery

US Mail Supply carries indoor & outdoor mailboxes, cluster units, postal drop boxes, and more mailboxes for USPS access. All products featured here are built of heavy-duty steel and aluminum, ensuring your product survives snow, sun, rain, and more.

Cluster Mailboxes for USPS Delivery

Cluster Mailboxes (CBU's)

USPS approved outdoor mailboxes & CBU's from US Mail Supply are ideal for installation on any corporate campus or multi-building property. These commercial mailboxes are built to USPS size and construction standards. The curbside pedestal mount and heavy-duty construction are built to withstand everything from the frigid snow of Wisconsin to the blazing sun of Arizona.

Shop now
4C Horizontal Mailboxes for USPS Delivery

4C Horizontal Mailboxes

Made of steel and aluminum, USPS approved 4C horizontal mailboxes from US Mail Supply are a heavy-duty option for apartments, condos, schools, municipal buildings and more. All 4C horizontal mailboxes from US Mail Supply are built to meet the construction and sizing requirements of the United States Postal Service.

Shop now
4B+ Vertical Mailboxes for USPS Delivery

4B+ Vertical Mailboxes

Available in five sizes, vertical mailboxes from US Mail Supply are USPS approved replacement mailboxes for commercial use. Choose from three to seven door options to find the best wall mounted mailbox for your facility. All vertical mailboxes from US Mail Supply are built to meet all USPS size and construction requirements.

Shop now
4B+ Horizontal Mailboxes for USPS Delivery

4B+ Horizontal Mailboxes

USPS approved replacement commercial horizontal mailboxes from US Mail Supply are ideal for use in offices, schools, and apartment lobbies. Made of heavy-duty steel and aluminum, horizontal mailboxes are built to meet the size and construction requirements of the United States Postal Service.

Shop now
4C Horizontal Apartment Mailboxes

Drop Boxes & Postal Specialties

Commercial postal drop boxes from US Mail Supply for USPS access are available in a wide range of styles and sizes. Pedestal mounted commercial drop boxes meet all USPS size and construction requirements. Packages and letters will be safe in a locking commercial drop box from US Mail Supply.

Shop now

Shop USPS-approved mailboxes from U.S. Mail SupplyUSPS-Approved 4C Horizontal Mailbox

Many commercial mailboxes are manufactured by Florence to comply with USPS approval right out of the box for new construction (although it's ALWAYS a good idea to contact your local postmaster to make sure), while some are only USPS approved as a replacement to existing systems. Browse our commercial and residential USPS approved mailboxes and choose indoor/outdoor mailboxes built for USPS compliance.

USPS approved mailboxes from US Mail Supply can be mounted on wall surfaces, recessed into apartment lobby walls, or even pedestal mounted outside your commercial facility. Not sure what mailbox is best for you? US Mail Supply is here to help you choose a mailbox for your commercial facility. US Mail Supply ensures you have the right USPS approved mailbox for:

Shop all mailboxes for sale at our online store.