Can you put a lock on your mailbox so that only the postman

Can you put a lock on your mailbox so that only the postman locked mailbox with slot The steel mailbox features a locking hinged door for security It features a top slot that measures 10 1 2 x 3 4 Mailbox is wall locked mailbox with slot Some have a slot for drivers to drop small items into but require a key to open Ring Mailbox Sensor in a mailbox

locked mailbox with slot The steel mailbox features a locking hinged door for security It features a top slot that measures 10 12 x ¾ Mailbox is wall mountable

locked money box with slot Salsbury Industries 56 34 in H x 31-18 in W Aluminum Front Loading 4C Horizontal Mailbox with 20 MB1 Doors2 PL's Available for pickup  The steel mailbox features a locking hinged door for security It features a top slot that measures 10 12 x ¾ Mailbox is wall mountable