I received a most welcome and, well, let's not hold back here, I should say Tight reply to my letter, as follows:
"Dear Postal Customer:
We have contacted the Yellowstone Post Office personnel responsible for the Grant Village Contract Postal Unit regarding your experience there. The Manager has been apprised of the situation and is taking the necessary actions to ensure that this practice does not continue. A notice will be issued to the Grant Village CPU supplier informing them that further inquiry of customer's religious beliefs and/or distribution of religious materials within the CPU will result in immediate termination of their contract for default. [This wasn't technically a Post Office, but was a contract office, sort of like a franchise.]
All concerned are now working together to ensure that you do not experience any further difficulties. Please accept our sincere apology for the inconvenience you have experienced."
Few things in life are better than customer service done right. I'm calling them Monday morning to tell them in person how much I love them and want to have their babies.