Greensboro mail drop-off is back after USPS installs new boxes

Why are there locks on Santee USPS collection boxes usps mail slot Find the mailbox or post office nearest you Get directions, see each location on the map, and mail your letter or small package usps mail slot The white ones are for Priority Mail Expresses packages These can be found in lobby drop-off slots or even on the office building mail chutes You can

vslot vue 3 Since some USPS blue boxes have slots only big enough to fit a letter, not a package, how does the USPS determine which boxes will not