{"domain":"mail.grenode.net","port":443,"address":"91.216.110.20","resolved_addresses":["91.216.110.20","2001:912:404:100::3"],"verified":false,"verification":"Certificate verification failed","verification_error":"Peer certificate CN=`doc.grenode.net' did not match expected CN=`mail.grenode.net'","certificate":{"subject":{"CN":"doc.grenode.net"},"issuer":{"C":"US","O":"Let's Encrypt","CN":"YR1"},"serial":"05B5AC43A9703C4CDD246ABF533994957E91","version":3,"valid_from":"2026-08-26T01:01:54+00:00","valid_to":"2026-11-24T01:01:53+00:00","validity":"valid_period","days_remaining":51,"san":"DNS:doc.grenode.net","signature":"RSA-SHA256","sha256":"F0:EA:27:EE:B7:DB:E4:45:79:71:B3:BA:FA:21:42:39:4F:53:B1:1A:2E:D7:1E:2A:8A:80:0E:D7:24:35:29:F3","key_type":"RSA","key_bits":4096,"curve":null,"extensions":{"keyUsage":"Digital Signature, Key Encipherment","extendedKeyUsage":"TLS Web Server Authentication","basicConstraints":"CA:FALSE","subjectKeyIdentifier":"4C:19:C7:F5:48:69:8E:3F:5B:CA:FD:4B:74:B3:E3:DC:2D:4D:A6:E7","authorityKeyIdentifier":"1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB","authorityInfoAccess":"CA Issuers - 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URI:http://apps.identrust.com/roots/dstrootcax3.p7c","authorityKeyIdentifier":"C4:A7:B1:A4:7B:2C:71:FA:DB:E1:4B:90:75:FF:C4:15:60:85:89:10","certificatePolicies":"Policy: 2.23.140.1.2.1\nPolicy: 1.3.6.1.4.1.44947.1.1.1\n  CPS: http://cps.root-x1.letsencrypt.org","crlDistributionPoints":"Full Name:\n  URI:http://crl.identrust.com/DSTROOTCAX3CRL.crl\n","subjectKeyIdentifier":"14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6","extendedKeyUsage":"TLS Web Server Authentication, TLS Web Client Authentication"},"pem":"-----BEGIN CERTIFICATE-----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\nUdHkhVNcsAKX1H7GNNLOEADksd86wuoXvg==\n-----END CERTIFICATE-----\n"}],"protocol":"TLSv1.3","cipher":"TLS_AES_256_GCM_SHA384","cipher_bits":256,"warnings":["Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`doc.grenode.net' did not match expected CN=`mail.grenode.net'"],"attempts":[{"address":"91.216.110.20","verified":false,"error":"Peer certificate CN=`doc.grenode.net' did not match expected CN=`mail.grenode.net'"}],"checked_at":"2026-10-03T16:25:10+00:00","resolver":"Public DNS resolver","scope":"One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan."}