mailbox slot in door
Internal mail
"Mail slot" and "Mailbox" redirect here. For the type of interprocess communication, see MailSlot. For other uses, see Letterbox (disambiguation) and Mailbox (disambiguation).
Amazon.ae: Door Hardware & Locks - Door Hardware & Locks / Hardware ...
While most post-mounted mailboxes have a door that opens and closes, the front of a collection mailbox has a slot for mail.
How to Install a Mailbox | USPS
Learn how to choose a mailbox, what Postal Service regulations apply to mailboxes, and how to mount your new mailbox.