Shop Indoor Mailboxes
Indoor mailboxes ensure mail for multi-family residences and universities are kept safe and secure. With durable construction, these USPS-approved locking indoor mailboxes can be used in many locations for reliable mail service.
Front-Loading Horizontal Mailboxes – 30 Mailboxes + Parcel
Product # 1400-75PLAvailable Finish options
Anodized Aluminum
$3,613.00Call For Pricing on 5+ units!Additional Discounts for Members!
Front-Loading Horizontal Mailboxes – 35 Doors
Product # 1400-75Available Finish options
- Anodized Aluminum
$3,150.00Call For Pricing on 5+ units!Additional Discounts for Members!
Front-Loading Horizontal Mailboxes – 4 Parcel Lockers
Product # 1400-54PLAvailable Finish options
- Anodized Aluminum
$1,377.00Call For Pricing on 5+ units!Additional Discounts for Members!
Front-Loading Horizontal Mailboxes – 6 Parcel Lockers
Product # 1400-64PLAvailable Finish options
- Anodized Aluminum
$1,950.00Call For Pricing on 5+ units!Additional Discounts for Members!
Front-Loading Horizontal Mailboxes – 6 Parcel Lockers
Product # 1400-74PLAvailable Finish options
- Anodized Aluminum
$2,018.00Call For Pricing on 5+ units!Additional Discounts for Members!
USPS Mailboxes
Subject to local regulations and installation requirements, our products can comply with USPS standards, as defined by the Postmaster General.
Please note that the USPS periodically updates mailbox standards and guidelines. Before proceeding with mailbox projects, we recommend you consult with your local Postmaster to comply with your specific area guidelines. US Mail Supply experts are standing by to help you navigate the product selection and installation process.
Safe and Secure Indoor Mailboxes
We are sure to have the right indoor mailbox for you no matter what your situation. From a small apartment building to an entire university, hospital or military base, we make sure everyone has a place to receive their mail in a space-conscious, efficient and convenient way.
U.S. Mail Supply builds all our indoor mailboxes with aluminum and stainless steel and with the option of either rear loading or front loading, depending on your application or preference. We adhere to the US Postal Service’s high standards and design our mailboxes for security and vandal resistance. We offer a huge variety of apartment mailboxes for sale for multi-family residences across the United States – from indoor horizontal mailboxes to outdoor cluster boxes.
Horizontal Lockable Indoor Mail Boxes for Multi-Family Residences and Universities
Its rugged construction and heavy build make the USPS-approved Horizontal Mail Boxes ideal for many locations. These high-security mailboxes provide tenants with reliable and safe mail service.
Fully-Customizable Mail Supplies
Customize your tenants’ mailbox with three number decals or engrave up to six characters for identification. Choose from either bronze or aluminum powder coat finishes. These horizontal mailboxes are used for indoor use only. Documents and dimensions for installation can be found on our product page.
Vertical Lockable Indoor Mail Boxes for Residential and Commercial Use
The Vertical Mailbox is the perfect mailbox for tenants. These are corrosion resistant and rustproof to increase the service life of the mailbox. All indoor commercial mailbox units are available in the original aluminum silver finish. We also offer these powder coated finishes:
- Brass
- Bronze
- Sandstone
- Green
This mailbox comes with one name cardholder per door for tenant identification. There are two installation options— recess mount or surface mount. You can count on highly-secure mailboxes for your tenants no matter which mounting method you choose.