You can opt-in to receive a weekly account summary regarding your PRO account. This summary will include a weekly summary break down of the number of messages sent, along with additional account information.
To opt-in to this notification, click Settings under Notifications in your left navigation. From here, you can click on the Email check box for the "Weekly Performance Summary".
*To verify or update the email receiving these Weekly Performance Summary notifications, go to your Account Profile page under the Notification Contact Info section.