out tray
noun [ C ] UK uk/ˈaʊt ˌtreɪ/ us/ˈaʊt ˌtreɪ/ (US outbox)
（办公桌上存放已处理或待发文件的）发文篮，待发信件盘
a flat, open container on a desk for letters and other documents that have already been dealt with and are waiting to be sent to someone else or put away
The letter is in your out tray. 那封信在你的发文篮里。