This is a picture of a mailbox. it is attached to a pole. it's front door is closed up and the handle is visible. you can see it's flag, and it is down.
This Mailbox icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.