Why do you assume the regulated entity will be better? Private carriers UPS and FedEx deliver to the doorstep of my farm, whereas the "universal service" US Postal Service won't come near us and requires we have a PO Box in town.
What? Where do you live? The USPS will deliver anywhere in the United States-including via float plain and mule train. I grew up in the middle of nowhere and every farm had a mailbox. Now, if you live on a private road they may require you to put a mailbox at the intersection of your private road and the public road, but thats the only rule I've ever heard of.