How often should I check my email security?
Check monthly, or whenever you change email providers, marketing platforms, or DNS records. Configuration drift is common when teams add new senders.
Free DNS mail security check
DNS Mail Security Check
Get a live SPF, DKIM, DMARC, MTA-STS, and TLS-RPT posture report with MX, TXT, DNS servers, registrar data, MTA-STS policy mode, policy-host SSL, and exportable client-ready summaries.
Check your domain
Results are generated from live DNS lookups. No account required.
See soft-fail policies, lookup pressure, and whether authorized senders are declared correctly.
Review policy strength, RUA/RUF coverage, and external reporting authorization in one place.
Confirm signing posture, MX routing, TXT records, nameservers, and registration expiration.
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Frequently asked questions
What does a DMARC policy of p=none mean?
It monitors authentication failures without blocking them. Move toward quarantine or reject after legitimate senders are aligned.
Why does SPF lookup count matter?
SPF permits at most 10 DNS lookups. Too many include, a, or mx mechanisms can make SPF fail and affect delivery.
What do MTA-STS modes mean?
Testing asks supporting senders to follow the TLS policy and report failures; enforce tells them to refuse delivery when valid TLS cannot be established.
Can I share these results with a client?
Yes. Send the report by email, copy a formatted summary, or export a client-ready PNG or PDF.