To use the Email Validation Service, you must buy email validations. To do this:
- Navigate to the Settings Page, Plans & Billing tab, Email validation section.
- Click Buy more.
- Select your plan and click Continue.
- In the Confirmation dialogue window, click Confirm.
- Now you see how many validations are left on your account.
For more information on how to use the Email Validation Service, see the following article.