To stop or edit planned emails from being sent to the lead, you can do the following:

- In the activity screen, click on an email that will be sent
- Then click on "edit"
- At that point, you see a button to remove the email (this will also stop future emails):

Luna writes emails 24 hours before they are sent. In case the email isn't written yet, you can stop the email sequence by clicking on "stop sequence":

Hope this is clear and let me know if you have any further questions! 🙌🏼