letter box

noun

1. 1. a slot, usually covered with a hinged flap, through which letters, etc, are delivered to a building
   2. a private box into which letters, etc, are delivered
2. Also calledpostbox a public box into which letters, etc, are put for collection and delivery

Example Sentences

"Post it in the letter box, leave it by the front door, do whatever you want but give it back to me," he added.

From BBC

Examples include harassment, stalking, threats, assault, and even a dead rat being pushed through a letter box.

From BBC

That column often saw him criticised for his views - he was accused of Islamophobia when he said Muslim women who wear burqas looked like letter boxes or bank robbers.

From Reuters

Johnson later lamented that women in burkas looked like “letter boxes.”

From Seattle Times

After repeated attempts to contact her, they found her when they peered through the letter box of her Woking flat.

From BBC