You can review SPF/DMARC/DKIM setup for your client in the Business App. Open Business App > Navigate to Settings > Email Configuration tab.
A red circle with the exclamation point next to a record indicates it has not been verified.
A green circle with a checkmark next to a record indicates it has been verified.
NOTE: the above "email configuration " option is only available under those accounts which has the customer voice product activated as there is option to customize the "send from" email in order to send out emails to customers from the domain name email address.