What Requires Attention
The BIG Questions
Domain Overview
Technical Findings
Email Authentication
Mail Transport Security
DNS Security
Brand & Certificate Controls
Priority Actions 4 total Achievable: Low Risk
Change your DMARC policy from p=none to p=quarantine (then p=reject). Review your DMARC aggregate reports first to ensure legitimate senders pass authentication.
Publish an MTA-STS DNS record and host a policy file at https://mta-sts.ietf.org/.well-known/mta-sts.txt. This tells senders to require TLS when delivering mail to your domain.
Publish CAA DNS records to restrict which Certificate Authorities can issue TLS certificates for your domain. Specify your preferred CA (e.g., letsencrypt.org, digicert.com). CAA is advisory — CAs must check it before issuing, but absence means any CA can issue.
TLS-RPT (TLS Reporting) sends you reports about TLS connection failures when other servers try to deliver mail to your domain. Helps diagnose MTA-STS and STARTTLS issues.
Appendix — Additional Resources
Full technical details including raw DNS records, DKIM public keys, IP/ASN mappings, resolver consensus evidence, and verification commands are available in the Engineer's DNS Intelligence Report.
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