DMARC Validator

The DMARC Validator analyzes a domain's DMARC configuration to confirm that the published policy, SPF, and DKIM settings align with the visible From header, reducing spoofing risk and improving deliverability. It targets security teams, domain administrators, and IT operations who manage email authentication. By translating DNS records into actionable remediation, it supports audits, onboarding, and incident response. It provides a concise assessment of policy enforcement, alignment results, and recommended fixes.\n\nConceptually, the tool performs a DMARC DNS lookup for _dmarc.domain, parses the record, and evaluates SPF and DKIM alignment according to the configured mode (relaxed or strict). It then reports whether the domain would pass under the current policy and highlights gaps in DKIM signing, SPF alignment, or subdomain rules. The output combines policy details with concrete remediation steps, such as adjusting the DMARC record, refining SPF alignment, or enabling DKIM with correct d= domains.\n\nWho benefits from this tool? Security engineers, email administrators, and governance teams needing auditable posture and deliverability improvements. The unique value lies in presenting precise alignment signals, enforcing policy visibility, and delivering prioritized actions. Use cases include pre-launch domain validation, post-change verification, and ongoing posture monitoring to reduce spoofing and increase mailbox trust.