To delete an existing blacklist, head over to the Control Panel, under the Organisation section, click on Manage Blacklists.
The list of existing blacklists will appear, you can search for the blacklist you want by scrolling through the list or entering the blacklist name in the following field.
Click the 'Pencil'-icon.
The following dialog will appear, click the Delete button.
Click the Delete button again.
Click the OK button, and you are done.
1. Ensure that you are a User with 'Administrator'-rights set up to be able to access Control Panel.