All of the world's postal services have peering agreements, the same as for Internet traffic. See also http://fortune.com/2015/03/11/united-nations-subsidy-chi

All of the world's postal services have peering agreements, the same as for Internet traffic. See also http://fortune.com/2015/03/11/united-nations-subsidy-chinese-shipping/ http://fortune.com/2015/03/11/united-nations-subsidy-chinese...