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13 / EMAIL SECURITY
SPF / DKIM / DMARC Inspector
Inspect a domain's email authentication records, trace SPF includes, inspect DKIM selectors and flag configuration problems worth investigating.
What this checks
SPFSyntax, duplicate records, recursive includes, DNS lookup pressure, missing include targets, terminal policy and risky
+all/?all configurations.DKIMSelector reachability, TXT syntax, public-key presence, revoked keys and key type. DKIM signing itself can only be confirmed from message headers.
DMARCPolicy, alignment modes, reporting destinations, subdomain policy, percentage rollout and common deployment gaps.
This is a DNS configuration inspector, not a complete mail-flow or deliverability test. Recommendations are engineering checks and should be validated against the domain's actual mail-sending services before changing DNS.