noun
receipt notification request indication
Computing term for a flag or signal requesting a delivery receipt, typically in messaging or email systems.
このメッセージには受信通知要求表示が設定されている。
This message has a receipt notification request indication set.
開封確認 is a more common term for read receipt, while 受信通知要求表示 is a technical specification term for the request flag itself.
Compound of 受信 (receiving), 通知 (notification), 要求 (request), and 表示 (indication). A technical term likely coined in computing standards.