Recurly sends all emails through recurly.com (or email.recurly.com), and they are sent based on the reputation of our domain. We have public SPF and DKIM and sign them to assure email providers that the emails come from us, making them unlikely to be considered spam. Since the emails are sent based on Recurly's reputation, it's no longer necessary for you to fill out SPF and DKIM yourself.
DMARC Email Signing
In order for emails from Recurly to be delivered, the DMARC policy of the email domain used for your Recurly email must be set to a policy of “p=none”, not “p=quarantine” or “p=reject”.
If you would like to monitor emails sent through Recurly more closely, we recommend setting up a domain for emails sent through Recurly (e.g. accounting.yourdomainname.com) and to use a DMARC policy for monitoring.
NOTE: Do not use recurly in the subdomain of the contact emails under Configuration - Site Settings - Advanced Settings - Email Settings. (For example, email@example.com is not acceptable, but firstname.lastname@example.org is.)
For customers on our Enterprise plan, we offer the ability to send emails on a dedicated IP address, which increases the likelihood that an email will be delivered and pass DMARC checks. Please contact Recurly Support if you would like more details.