Who uses those receipts for e-mails read? Most people either block sending receipts altogether or ask to be notified before sending a read receipt (a default setting in Microsoft Outlook and other mail clients). So read receipts either don't work at all, or they require acceptance by the recipient--no sure thing.
That doesn't mean that we aren't curious about when the messages we send are opened, and when the links they include are followed. For most organizations, this information can be a valuable asset. The Zendio add-on for Microsoft Outlook tracks the messages you select and records … Read more