Mailboxes, Mail Slots and Mounting Hardware

Where the mail will land

A wall-mount box fits beside a front door, a post-mount box stands at the curb or driveway, and a mail slot sits in the door or wall. Horizontal boxes hold wider items and magazines; vertical designs take less width. Curbside boxes in the US follow postal size and flag rules, so check your carrier's requirements and look for an approved design. Locking models slow mail theft, but check that the slot or door opening still takes the mail you receive.

Finish, fixings and slot size

Enamel-coated steel is a common finish that needs the coating intact to keep rust out; aluminum and solid brass do not rust. Check the fixings supplied, since a post-mount box needs bolts that suit the post, and a wall box needs anchors for brick or siding. Letter slots list their opening, such as 10 inches by 3 inches; an opening of 10 inches takes a standard envelope, while large mail needs a box instead. For door slots, check the door thickness and any interior flap or frame.

Questions about Mailboxes, Mail Slots and Mounting Hardware

How high should a curbside mailbox be mounted?

US postal guidance puts the box floor 41 to 45 inches above the road surface, with the box front set back 6 to 8 inches from the curb face. Check your carrier's rules for a rural route or a local variation.

Do I need a locking mailbox?

A lock reduces mail theft and helps if you receive sensitive documents. Choose a locking model with a letter slot that still lets carriers drop mail in without opening the door, and make sure packages have another route.

How do I fit a mail slot in a door?

Mark the opening using the maker's template, drill a pilot hole at each corner and cut the slot with a jigsaw, then fit the outer plate and any back plate or interior frame. Check the door thickness against the slot's fixing length first.