Delete Archive 

If you would like to delete a previously sent newsletter from the system, use this menu item, “Delete from Archive.” The newsletters will be displayed in the form of a chronological tree structure. Before you remove a newsletter from the system, you can check to make sure it is the right one by clicking on the -button. To remove a newsletter from the system, click on the -button. 

Abb. 13.3 - Newsletter Archiv - Löschen 

The full text search function may be used here, too.