Mailer License

The Setup's "License" tab is not editable, but allows you to see how many emails you are licensed to send per any given period of time.

At the top, you will see the number of emails you are allowed to send every day, week, or month.

Beneath this, you can check the remaining number of emails that you are licensed to send in the current period, as well as view the date on which the next period will start.