What is a USPS Approved Mailbox? A Guide to USPS Standards

A Guide to USPS Mailbox Regulations usps mail slot requirements Slots for incoming mail must be at least inches high by 10 inches wide · Protective flaps on locking mailboxes must be oriented inward so usps mail slot Locked designs : a Mail slot design b tomers if their mailbox does not meet postal regulations Alpha

k9win slot The opening must be at least 1 12″ x 7″ · The bottom of the slot must be at least 30″ above floor · Horizontal slots must have a flap hinged at the top