Shipping Internationally From The U.S. Without Spending A Fortune
It might fly at your local US post office, but what about when it reaches a main hub, such as Tampa, Atlanta, NYC, ect? One can't be at each and every stop to try and defend the rules.
While I appreciate all your time and effort and agree 100%, the US post office makes their rules and they can bend them anyway they wish. They are so broke, they aren't going to give one inch where money is concerned. They think by upping the postage rates it's going to solve their 'problem'. It's not, it's just a bandaid. They keep doing business as usual, people will find other ways to ship stuff.
I think this might be a concern if you just drop the envelope in a mail box, but once it's accepted and stamped at a post office it shouldn't be sent back at a hub. According to the USPS person I spoke to, these issues are for the local post office to assess.