A postbox (mailbox, letterbox) with a letter in its slot for collection. Generally depicted in red with a white envelope, styled after public postboxes in Japan. May also evoke postboxes in the United Kingdom.
Used for various content concerning postal deliveries and email. Microsoft’s design was previously blue, after U.S. mail collection boxes.
Postbox was approved as part of Unicode 6.0 in 2010 and added to Emoji 1.0 in 2015.
U+1F4EE
? Postbox