When the subscription process has been initiated, we have three stages as shown in the subscription navigation menu.
3. Confirmed. In this stage, we have the subscriber that confirmed the subscription in the mail they received.
2. Not Confirmed. In this stage the have the subscriber that received the e-mail but still did not confirm
1. Confirmation send. In this stage, we have sent an email to the subscriber asking for confirmation
Below is an example of the CONFIRMED list.