D DMARC Domain-Based Message Authentication, Reporting, and Conformance What it does: Combines SPF and DKIM results and tells the receiver what to do if an email fails the checks. Jack Zagorski Sep 27, 2025 Domain-Based Message Authentication, Reporting, and Conformance What it does: Combines SPF and DKIM results and tells the receiver what to do if an email fails the checks. You can configure your DMARC policy to instruct receivers to do three things: Nothing – Just collect reports, but don’t block anything. Quarantine – Send suspicious emails to spam. Reject – Block emails that fail the checks. D