If your account is on the Pay Per Email plan, you can purchase additional email credits at any time:
- Choose Direct Mail > Purchase Email Credits from the menu bar at the top of your screen
- Choose how many credits you want to purchase
- Choose your payment method
- Click Purchase
- If you are not using a saved payment method, you will be prompted to complete the purchase in your web browser
Your email credit balance will be updated immediately. An email receipt is sent to your account's email address.