From securityweek.com
Nearly one million domains use DMARC, but only 13% of them are configured to actually prevent email spoofing, according to a report published this week by anti-phishing solutions provider Valimail.
DMARC (Domain-based Message Authentication, Reporting and Conformance) is an email authentication, policy, and reporting protocol designed to detect and prevent email spoofing. Organizations can set the DMARC policy to “none” in order to only monitor unauthenticated emails, “quarantine” to send them to the spam or junk folder, or “reject” to completely block their delivery.