The same laws I described, along with pricing. While the laws don't directly prohibit private delivery to those areas, they greatly reduce the economic incentive to do so by (1) prohibiting delivery to regular mailboxes and, (2) allowing USPS to charge such low rates so as to lose money on every delivery (no one can compete with that).
chrisseaton|5 years ago
Apparently it's literally illegal for anyone but USPS to put something in your mailbox https://blog.oup.com/2017/07/mailboxes-us-mail/.
SolaceQuantum|5 years ago
toomuchtodo|5 years ago
cjsawyer|5 years ago
curiousgeorgio|5 years ago