DMARC (Domain-based Message Authentication, Reporting & Conformance) is a email authentication, policy and reporting protocol that enables organisations to protect their domain from unauthorised use, including spoofing and phishing**.
DMARC is an e-mail standard that:
confirms the identity of the sender, using SPF and DKIM, which are already exposed;
tells the recipient's e-mail service what to do with e-mails that have failed the check;
asks the recipient's e-mail service to provide reports on where the e-mail came from.
The receiver's e-mail service uses the SPF and DKIM standards to confirm the identity of the sender. If the receiving e-mail service confirms the identity of the sender, it will forward the e-mail to the recipient's inbox. If, on the other hand, the receiving e-mail service is unable to confirm the identity of the sender, it will mark the e-mail as spam.
The advantages of implementing the DMARC protocol are many. In fact, it helps protect your business and reputation from fraudulent attacks, reduces customer support costs related to e-mail fraud, improves trust in e-mails sent from your e-mail address, and allows you to monitor the legitimate and/or fraudulent use of your domains through reporting.
DMARC configuration can be quite complex, if you are not able to do this yourself, ask your IT consultant for help or contact our support.