What Requires Attention
The BIG Questions
Domain Overview
Technical Findings
Email Authentication
Mail Transport Security
DNS Security
Brand & Certificate Controls
Priority Actions 6 total Achievable: Low Risk
SPF (Sender Policy Framework) tells receiving mail servers which IP addresses are authorized to send email for your domain. Without SPF, any server can claim to send as 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).
Publish an MTA-STS DNS record and host a policy file at https://mta-sts.yourdomain.com/.well-known/mta-sts.txt. This tells senders to require TLS when delivering mail to your domain.
DKIM selectors were not discoverable via common selector names. This does not confirm DKIM is absent — your provider may use custom or rotating selectors that cannot be enumerated through DNS (RFC 6376 §3.6.2.1). Check your email provider's DKIM settings to confirm signing is enabled.
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.
Publish a BIMI DNS record pointing to your brand logo (SVG Tiny PS format). For full support in Gmail, you will also need a Verified Mark Certificate (VMC).
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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