I love the US Postal Service!!!
We take the US Postal Service for granted, and often grumble about it, but it may be that the ability to send things to people and know they will get there without tampering, prying, or undue delay is a big part of what makes the “first world” first.
Today the world is a smaller place than it was when I was a student in Boston, MA back in the early eighties. My family is all on the west coast and the cost of homesick phone calls was a significant part of my budget. My own son has lived, and is living now, in places much farther away. To call him in China using Skype costs next to nothing (1.1 cent per minute). I can send him pictures in no time using email and, if he happens to be someplace with broadband or wifi, video chat with either QQ or Skype for free.
But getting a physical package or letter to him is another story.
In Japan, 2007-8, we had no problems, the US Post Office has a flat rate box that would get things to him in less than two weeks. In Kenya, 2011, we were told: “don’t even try” for anything more than a greeting card, and “nothing is private”. You sent mail care of someone who had a post office box in town, usually a family member or friend who either lived in town or went there on market day. They would deliver when they got a chance.
China has a postal system but folks don’t seem to have mail boxes or regular delivery. Both DHL and the postal system need a phone number, which they call and arrange a meet for delivery. I am sure that any package just left would be viewed as abandoned and taken. Experience has shown that DHL, in spite of what is advertised and charging a pretty hefty premium ($210 versus $85 for the same package) does not get things there any faster.
Back to the good old USPS.