Follow these steps to delete any draft campaigns in your email account that you don't need anymore: 

1. Inside the email dashboard, click Campaigns

2. Under Recent Drafts, find the draft you'd like to remove and hover over it

3. On the far right of the row, two icons will appear (duplicate or delete), click the trash can icon

4. On the next screen, check the box to confirm you'd like to delete that draft

5. Then click the "Delete the draft" button