A mailroom is a centralized delivery installation for office buildings and shopping malls. Mailroom installations can include a call window, served during specified hours by a Postal Service employee, as well as parcel lockers and vending equipment. Mailroom installations offer the opportunity to achieve a “mini-Post Office” within an office building.

We recommend that developers and builders plan for basic or customized Centralized Mail Delivery installations during a project’s design phase. However, the Postal Service is willing to work with developers, builders, and owners at any stage of development.


first image shows cluster box as a customer approaches; second image shoes the unit turns to allow postal access for deliverycluster box unit displays access for delivery from behind

For more information on Centralized Mail Delivery, contact your local Post Office.

Publication 265-B, October 2013