USPS Specs

The slots for the incoming mail must be at minimum of inches high by 10 inches wide • Slots on locking mailboxes must be able to hold the residents daily

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 Vertical

usps mail slot requirements mail, like the ones still in use at the Madeira Post Office US Postal They don't even have a pull-down flap, just a tamper-proof slot

t slot hold down clamps Legality aside, it's extremely rude of you to suggest using someone else's outgoing mail slots because going into the post office is an