Findings
No check run yet.
SMTP transport security
Validate MTA-STS policy, TLS reports, and MX coverage in one pass.
Enter a domain to check DNS opt-in, the HTTPS policy file, policy-to-MX alignment, and TLS-RPT destinations. Paste aggregate TLS report JSON to decode failure counts for an incident or rollout note.
DNS_mta-sts and _smtp._tls
Policymode, mx, max_age
ReportsTLS-RPT JSON decoder
Domain check
Score
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Waiting for domain
MX coverage
Run a domain check to compare MX hosts with policy patterns.
Starter output
DNS and policy output will appear here.
Techclick next step
Turn the result into email security practice.
Use the checker output as a learner lab: explain the failed control, compare the mail-authentication tools, then move into interview or course guidance with the same evidence.
TLS-RPT decoder
Ready