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.youisp.com.br · 209.145.57.211:443

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
OU=Zimbra Collaboration Server CN=mail.youisp.com.br
Issuer
O=CA OU=Zimbra Collaboration Server CN=mail.youisp.com.br
Valid from
2023-01-21T03:33:57+00:00
Expires
2028-01-20T03:33:57+00:00
Days remaining
467
Serial (hex)
1674272032
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:mail.youisp.com.br

SHA-256 fingerprint

B2:BC:47:2A:10:1E:0A:86:4C:81:DD:6E:E8:69:44:23:B2:A1:71:1B:FC:AC:93:52:CA:23:93:85:00:27:BA:35
Certificate extensions & PEM
basicConstraints
CA:FALSE
keyUsage
Digital Signature, Non Repudiation, Key Encipherment
subjectAltName
DNS:mail.youisp.com.br
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-09T22:25:37+00:00

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

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