Smart Post: FedEx and USPS delivery program
Sure Post: UPS and USPS deliver program
At least in our rural WV town, USPS will not accept delivery of UPS or FedEx packages to their P.O. Boxes.
I thought a P.O.Box was a great solution and was going to rent one, but if I can only get USPS packages, I then the rental cost is too high to justify.