retired from the post office. the po does have a contract with fed ex, part of the terms, at least a few years back was it allowed fed ex to have a pick up box at the po. the facility i worked at 70% of the incoming/outgoing mail was flown by fed-ex. ground transportation, at least outside of the Phoenix area itself was handled by private contractors. on the west coast Mattheson does alot of the ground transportation. in the facility i worked at ups was there daily delivering stuff, some companies do not use the post office for shipping. i used to go out and collect the mail once a day, you would be surprised at how many people would drop ups/fed/ex/dhl stuff in the mail box. we even would find library books in the collection box. but the po has a monolopy on your mail box, it is for them and them alone. there is alot more to the po than people realize. most people seem to think it is a window clerk and a carrier. i was a mailhandler, my main job was canceling stamps. but my craft was responsible for moving the mail thru out the building and rough cutting of mail. no final sorting, but a rough sort. only bigger facilites have mailhandlers. rather extensive maint. craft.