To block email tracking or block sending read receipt in Outlook, please do as follows:

1. Click File > Options to open the Outlook Options dialog box.

2. In the Outlook Options dialog box, click Trust Center in the left bar, and then click the Trust Center Settings button. See screenshot:

3. In the Trust Center dialog box, click Email Security in the left bar, check Read all standard mail in plain text option in the Read as Plain Text section, and click the OK button. See screenshot:

4. Now you return to the Outlook Options dialog box. Go ahead to click Mail in the left bar, check Never send a read receipt option in Tracking section, and click the OK button. See screenshot:

From now on, all incoming email will be converted to plain text automatically, and all read receipt requests will be blocked automatically in your Outlook.

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