posting mail in a postbox
Refers to the act of dropping mail into a public postbox or mailbox. Often used in contexts like ポスト投函可能 (can be posted) or ポスト投函で送る (send by posting).
This envelope can be sent by posting it in a mailbox.
postbox delivery; delivery to a specified location
Used especially in logistics and e-commerce to mean delivery to a designated postbox or a specific drop-off point, rather than hand-to-hand delivery. Common in phrases like ポスト投函配送.
Postbox delivery shipping is cheaper.
Compound of ポスト (post, mailbox) and 投函 (posting, mailing). The exact origin is uncertain, but it likely arose in logistics and postal service contexts to specify the method of delivery or sending.