You can delete a newsletter, if required. Click on Newsletters link available in the left sidebar. The sub-links appear as below.
Click on All Newsletters link. The list of all newsletters appears.
Locate the target newsletter.
n Action column, click on its View button.
The newsletter row expands to show the newsletter details, including its description.
Click on the Delete button available in the newsletter details section. The backend system asks you confirm if you want to delete this newsletter. Click on Ok to confirm it.