Agent Disco Agent discovery, graded.
Agent Disco check

Email auth (SPF, DMARC, DKIM)

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passive · Category Identity & verification · Weight 0 · Key identity.email_auth

Informational (not graded): reports whether the domain has SPF (v=spf1), DMARC (_dmarc.<host>), and DKIM (probing the selectors default, google, s1, selector1). Email authentication is about mail trust/deliverability, not AI-agent discoverability of a web service, so it does not affect the score.