Mailboxes Depot is an independent US directory and information resource for people who need their mail delivered somewhere other than their home. It lists 10,944 mailbox centers, shipping stores, pack-and-ship counters, and print-and-ship businesses across 3,860 cities in all 50 states and Washington, DC. Users can browse by state or city, search listings, and compare addresses, contact details, and available services, including private mailbox rental and package acceptance.

The site helps visitors understand the differences between mailbox centers, shipping storefronts, packing specialists, and business centers with printing services. Its practical tools include calculators for comparing mailbox costs and estimating forwarding expenses, a Form 1583 checklist, a CMRA address formatter, and a domicile-state comparison. Mailboxes Depot also publishes plain-English guides on topics such as mail forwarding, package fees, privacy and mail scanning, bank address requirements, and managing official mail while travelling. Designed for people without a fixed address as well as anyone comparing mail options, the resource aims to make finding and evaluating a suitable mailbox service more straightforward.