What is DMARC?
DMARC, which stands for “Domain-based Message Authentication, Reporting & Conformance”, is an email authentication policy and reporting protocol.
DMARC allows a sender do indicate if their messages are protected by DKIM and/or SPF, and tell inbound servers what to do when receiving a message that is not authenticated – for example, reject the message, or report it as spam.
DMARC eliminates any uncertainty at reception: although SPF and DKIM help to prove that a message is legitimate, their absence does not however prove that they are not legitimate.
Your DMARC policy makes up for this uncertainty by indicating precisely how to process messages that are not authenticated.
Implementing a policy
The site https://dmarc.org contains all the necessary resources to help you understand DMARC, and to prepare and test your policy.
Some more technical tools are also presented in this section: https://dmarc.org/resources/deployment-tools/
DMARC vs Dialog Insight
Although DMARC is a company’s policy, its operation is based on the proper technical configuration of various systems that send emails by using your domains, including yours, Dialog Insight’s and any other partners or systems used to send messages on your behalf.
If you apply the authentication configurations, either by DKIM signatures or SPF protocol, messages sent from the Dialog Insight platform will be properly authenticated, and will satisfy your DMARC policy.
To learn more about the various configurations to perform when a new account is opened, read the linked articles, as well as the Complete Initial Account Configuration Guide.