When our system finds that you have been hosting a DKIM key that we know is used by a specific service, we automatically add that service to your configuration for a domain.
To let you know what we're doing, we show you that the service has been automatically configured for you.
Specifically, this means we have
- found the service
- marked it approved
- enabled SPF support
- imported a DKIM key for it that we have seen your domain already hosting
Just one of the many automations that make your DMARC project simpler and more clear.