Had a few questions about surepost..... how dose UPS decide what parcels go regular ups basic that we deliver...or go basic I drop off to the post office..or go into the bags as surepost? How much of a discount do shippers get using surepost instead of basic or regular ups? is there a limit to the amount of volume the post office can accept? Thought basic was supposed to be 1lb small packages that fit into mailboxes..not the 10ib oversized ones I drop off at the post office now. why are we not stealing more business from smartpost and priority mail if this is such a great sevice? can I deliver a surepost package?