Boîte De Réception

A paper tray with a down arrow on top, as a symbol for an email inbox. Generally depicted as a white or wooden try with a red arrow. Samsung and Twitter's arrows are green, WhatsApp's gray.

May be used for various digital activity, including downloading, messaging, and emailing.

Facebook's design contains paper, as did an earlier Google design. 

See also 📤 Outbox Tray.