A physical receptacle into which postal carriers deliver incoming mail, to be picked up by the recipient. Also known as letterbox*, letter plate, letter hole, mail slot, etc. (wikipedia)

Examples: post #951740, post #913214

For tagging purposes, distinct from postbox, which is for outgoing mail.

*However, letterbox is used here to refer to the image composition technique.

See also

• Pixiv tag search: 郵便受け

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