DNS
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

mail.exofilter.com · 178.22.57.222:443

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

Certificate verification failed

Subject
CN=sni-support-required-for-valid-ssl
Issuer
CN=sni-support-required-for-valid-ssl
Valid from
2026-11-11T14:14:24+00:00
Expires
2036-11-08T14:14:24+00:00
Days remaining
3647
Serial (hex)
168A4B6C61BD0E0761F23C7574DEC0A792A68BEC
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4C:E8:C4:35:43:53:C1:FB:70:07:A3:CC:E1:1C:6F:89:FB:ED:9F:2E:16:46:FB:6D:2C:91:4B:27:94:64:83:1B
Certificate extensions & PEM
subjectKeyIdentifier
5B:36:D5:79:F1:30:F1:48:BD:5D:52:23:13:1D:E9:12:6B:B5:66:20
authorityKeyIdentifier
5B:36:D5:79:F1:30:F1:48:BD:5D:52:23:13:1D:E9:12:6B:B5:66:20
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-13T15:28:00+00:00

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

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