Last but not least, set the plugin your way?
Once installed and active, follow these steps In your WordPress account
1. Go to Settings→ Clearout email validator→ Enter
2. Enter the API token (click on ‘Apps’–> Click on ‘+ Create App’–> Choose ‘Server’-> Provide the required details –> Click on Create)
3. Provide the timeout you wish (The time allowed to validate the email ID once submitted by the registrant/subscriber)
4. Select the types of email addresses you want to be shown as valid.
5. Click on ‘Apply’