Our data indicates Braintree supports DMARC compliance via SPF.
DMARC Compliance via DKIM could not be verified. Contact Braintree for more information.
Add 'include:spf.braintreegateway.com' to your SPF record. For more information on Braintree's SPF setup, contact their support or visit: https://articles.braintreepayments.com/guides/configuring-spf-records