read receipt
noun [ C ] (also read-receipt) uk/ˈriːd ˌrɪˈsiːt/ us/ˈriːd ˌrɪˈsiːt/
（显示发出的电子邮件已被看过的）信件回条，读信回条
a message showing that someone has received and opened an email you sent
He sent in his application by email and two weeks later got a read receipt. 他通过电子邮件发送了申请，两周后收到了已读回条。
- More examples
- Requesting a read-receipt does not guarantee you will get one, as some users disable the function.
- Read receipts are sent to your inbox as email messages.
- Avoid using read receipts - they tell you that the recipient has opened the e-mail but not necessarily that they have read it!
- I can't stand people who print every email they get, even the read receipts for emails they sent!