12 tagged email security, measured the same way as everything else here.
Browse within: dmarc 10awareness 9phishing 9social-engineering 9threat-intelligence 7url-analysis 7
Skill Claude CodeCodex
Triage recon fingerprint candidates across the bounded DNS catalog surface. Reads private single-domain discovery output, aggregate catalog baselines, or candidate queues, then classifies candidates as pending, promoted, rejected, or deferred under the v2.14 catalog-quality gates. Use when the user asks to find…
Skill Claude CodeCodex
Public-metadata domain intelligence - Microsoft 365 / Google Workspace tenant identification, email security configuration (DMARC, DKIM, SPF, MTA-STS, BIMI), SaaS fingerprinting from DNS, certificate-transparency findings, related-domain discovery. Use when a domain name appears alongside phrases like "what does use"…
Skill Claude CodeCodex
Use when a domain's email is landing in spam, or you see SPF PermError / "too many DNS lookups", DMARC stuck at p=none, a "550 5.7.515" or "550 5.7.1" rejection, DKIM failures, or a domain that might be blacklisted. Diagnoses SPF, DMARC, DKIM, MX, DNS, blacklist and domain/SSL expiry against the DNS Doctor MCP server…