Under Contacts > Lists, you will see a section on the left where your lists are grouped by the HubSpot tools that they are currently "used in". The tools listed may vary based upon your subscription type and the tools you have access to.
- One of the groups you will see is called "Unused Lists":
- The "Unused Lists" section refers to your lists that do not fall into the other "used" categories, and does not reflect whether or not a list has been used in an email. Any list in this section can be used in an email, but it will continue to appear in the "Unused List" category unless it is used in some other tool.