Hi @Microsoft Q & A ,
The sender receives this receipt only if the recipient confirms sending the Read Receipt.
The same is true for distribution groups, if the recipient does not choose to send a receipt, the sender will not receive them.
Outlook Client:
Outlook for web:
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread