Accessing and using subscribed emails

I have a bit of experience with Concrete, but am just getting back into it after a year or two away. I am building a new site using v9, and note that the default footer area in the Atomik theme includes an email subscription form. I can find no reference to this in the documentation. Where are these subscribed emails stored? Is there a system for sending emails to the subscribers? Is there an option to link the form to an external email management system.

@cmgill You can find your form results in the dashboard under reports. go to Dashboard>Reports>Form Results>Mailing List

Thanks Jes. And do you have answers to my other questions about making use of the captured email addresses?

Concrete comes with the ability to send private message notifications to users, but I don’t think that is what you are looking to do.
There are a couple of add-ons that support sending emails.