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These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `mail.calibernode.com'"],"attempts":[{"address":"216.230.234.63","verified":false,"error":"Peer certificate subjectAltName did not match expected name `mail.calibernode.com'"}],"checked_at":"2026-10-15T12:07:51+00:00","resolver":"Public DNS resolver","scope":"One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan."}