Create a new SmartList and choose the option Create a new SmartList based on an existing one then choose the All Donors SmartList from the dropdown menu. If you also want to include Affiliate Donors, you will want to instead choose the All Donors and Affiliate Donors SmartList.
Click on the Don't Show tab.
Click on Add Criteria Set
Click on the click here to select a criteria category option. Choose Phone/Email Info and then choose Partial Email. Enter in *.* in that field. Click Ok. (This will remove all the donors that have email from the list) Click Next and then name and save your SmartList.