"How to delete a contact from a marketing list using a nurture program" in ClickDimensions Help - comment added by Rhys Saraceni

Hi Kylie

You do not have a wait step between sending your email and checking if it has been opened, so the nurture is checking if the email is opened immediately after it is sent, causing it to return "no" because it checks before you open it. If you add a wait step, you should see the nurture function as expected going forward.