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THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

mx2.spamfiltering.com · 78.129.212.228:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed
The certificate has expired.

Certificate verification failed

Subject
CN=*.spamfiltering.com
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Valid from
2025-09-06T00:00:00+00:00
Expires
2026-09-05T23:59:59+00:00
Days remaining
-32
Serial (hex)
02E61A63479EB31E1520A4C52A815C92
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.spamfiltering.com, DNS:spamfiltering.com

SHA-256 fingerprint

13:B3:86:76:6A:D0:82:3C:6C:B2:7A:82:81:A6:29:C2:C1:55:80:95:DA:6E:C5:CC:2F:B8:4F:25:95:7E:99:17
Certificate extensions & PEM
authorityKeyIdentifier
0C:DB:6C:82:49:0F:4A:67:0A:B8:14:EE:7A:C4:48:52:88:EB:56:38
subjectKeyIdentifier
84:87:F6:AE:04:9D:7C:E5:8E:BD:36:C9:C9:3F:CE:2B:E2:EC:F4:C8
subjectAltName
DNS:*.spamfiltering.com, DNS:spamfiltering.com
certificatePolicies
Policy: 2.23.140.1.2.1 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://cdp.rapidssl.com/RapidSSLTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.rapidssl.com CA Issuers - URI:http://cacerts.rapidssl.com/RapidSSLTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Sep 6 07:58:04.054 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:23:29:AD:3F:88:1E:23:32:A8:00:15:E2: 62:C6:F7:49:85:EC:18:F7:0A:F8:0D:06:4C:EA:DD:84: F5:EA:66:FF:02:21:00:D7:4F:7D:7F:32:D4:A1:92:7C: CF:1E:76:97:A4:6A:20:9E:B5:07:67:D2:9B:9A:AC:BD: 44:C9:A3:F8:44:64:F1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Sep 6 07:58:04.117 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:3B:9D:58:D6:15:22:DE:96:87:F9:E5:B0: B6:48:87:FE:CF:D0:22:79:4E:8F:55:D6:77:80:16:88: DF:A5:DA:B8:02:21:00:E1:5D:6D:95:51:1D:B9:6B:31: 88:D1:A9:87:3C:F7:E1:73:6C:54:41:1F:4F:98:B7:3F: 0F:3E:50:86:81:73:57 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Sep 6 07:58:04.134 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:CD:0A:FB:F3:B1:CA:4D:FC:84:A1:8B: 5C:C5:23:D6:3C:07:22:2E:FA:CD:3B:19:E8:B8:17:C3: 4A:EB:02:DC:19:02:20:03:D9:1D:B3:E4:D4:36:A7:CC: 72:62:3A:95:3A:68:ED:25:4F:F6:FE:64:26:0C:76:40: 66:FE:A0:86:CD:AB:DC
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-07T15:52:41+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:24:33+00:00
Expires
2027-11-02T12:24:33+00:00
Days remaining
390
Serial (hex)
0B259422CED9812A15A04E99528A0EFA
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

44:22:E9:63:EE:53:CD:58:CC:9F:85:CD:40:BF:5F:FE:C0:09:5F:DF:1A:15:45:35:66:1C:1C:06:BC:AD:C6:9B
Certificate extensions & PEM
subjectKeyIdentifier
0C:DB:6C:82:49:0F:4A:67:0A:B8:14:EE:7A:C4:48:52:88:EB:56:38
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.1.1 CPS: https://www.digicert.com/CPS Policy: 2.16.840.1.114412.1.2 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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