1.  Contacts who are sent a newsletter are tagged with the corresponding month and year. For example, their name may have a “June 2020 newsletter tag.” 
2. To find contacts that have received the newsletter, click “Contacts” at the top of your toolbar.
3. Find “Advanced Search” button on the right side of your screen. 
4. Scroll down to the “Tags” section.
5. You can either include or exclude a tag in your search.
6. Click the dropdown to pick the relevant tag you would like to include or exclude (e.g. “June 2020 newsletter”).
7. Click “Save”.
8. You will be shown a list of contacts with the specified tag.