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A curbside mailbox (letterbox, postbox) with its door latched shut and signal flag raised. Generally depicted in blue or gray with a red flag. Used for various content concerning postal deliveries and email.

Indicates in the United States that incoming mail (post) has been delivered. May also indicate that there is outgoing mail for pickup.

An early Apple design showed an open mailbox with an envelope, similar to its 📬 Open Mailbox With Raised Flag design.

Compare 📪 Closed Mailbox With Lowered Flag, 📭 Open Mailbox With Lowered Flag, and 📬 Open Mailbox With Raised Flag.