DMARC analyzer
Inspect a domain’s DMARC policy.
Your input is processed by this site to return the result. Avoid entering sensitive information.
What does this tool do?
DMARC uses aligned SPF or DKIM authentication to evaluate the visible From domain and publishes a policy for failures and reporting.
Why is it useful?
A considered DMARC deployment helps domain owners monitor authentication and reduce domain spoofing; some mailbox providers impose sender requirements.
How to use it
- Identify legitimate sending services and configure SPF and DKIM.
- Inspect your published DMARC record and review aggregate reports.
- Correct alignment problems before moving gradually to a stronger policy.
What the result can and cannot tell you
A published record alone does not prove alignment or compliance. Provider requirements vary, and authentication does not guarantee delivery.
Sender requirements and compliance
Mailbox providers have their own rules, which may depend on sending volume and recipient type. For example, Gmail's requirements for bulk senders to personal Gmail accounts include SPF, DKIM and DMARC. Consult the current provider guidance and test your actual messages; a record lookup alone is not a compliance assessment.