How can I tell if my Yahoo sent email was received or read ?
If you send an email from Yahoo Mail and do not receive a failed delivery message, the email was sent to the email system of the desired recipient. But that does not guarantee that the email has been opened and/or read.
Yahoo Mail does not provide a "read/return receipt" function.
To confirm that your recipient has received and/or read an important message, we suggest that you confirm receipt by sending a response.
If you receive "read/return receipts" in your Yahoo mail account, they may come from: