USPS Reveals Purpose Behind Green 'Relay' Mailboxes in Webster

A mail slot is not a mailbox So putting a key through a mail slot after locking the door is not the same as putting the key in a mailbox

Brainstorming, I'm thinking the item might have been placed in another person's mailbox slot in one of the clusters, but some units are not

usps mail slot • If you have a curbside mailbox, or a mailbox on the outside of your house, USPS Conversely, USPS regulations do not govern what can be placed in a mail slot

togelup slot Exclusions from USPS Rules Door slots and other non-lockable bins used with apartment mailboxes are subject to the same regulations as a