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.mmh-inc.com · 209.54.49.120:443

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
C=CH L=Schaffhausen O=Plesk CN=Plesk emailAddress=info@plesk.com
Issuer
C=CH L=Schaffhausen O=Plesk CN=Plesk emailAddress=info@plesk.com
Valid from
2023-09-01T02:34:03+00:00
Expires
2024-08-31T02:34:03+00:00
Days remaining
-798
Serial (hex)
64F14D9B
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

6E:62:52:60:30:C1:BC:3A:BF:43:6D:DE:CB:AA:05:46:7E:4F:C2:1E:EE:6A:44:BD:A9:ED:57:16:17:2B:AA:77
Certificate extensions & PEM
extendedKeyUsage
TLS Web Server Authentication
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-06T23:44:21+00:00

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

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