Hi I am having an issue with Thunderbird automatically sending a read receipt response email to the original sender when I open an email which has the tracking feature activated. I have already tried changing the Return Receipts for both the account and global settings to Never Send and to Ask Me but both options just send the response. I have also confirmed that my Exchange Online Admin portal has the Read Response set to Never Send but get the same result of the receipt email being sent if I open the email.