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 (Available in your Clearout profile, just copy and paste)
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’