SSL-Tools

SSL check results of cclaussen.de

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Discover if the mail servers for cclaussen.de can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

JSON Refresh

Report created Sun, 27 Sep 2020 23:54:48 +0000

The mailservers of cclaussen.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @cclaussen.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
cclaussen.de
78.47.244.63
 100
supported
secure.opentek.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

We have not received any emails from a @cclaussen.de address so far. Test mail delivery

Certificates

First seen at:

CN=secure.opentek.de

Certificate chain
Subject
Common Name (CN)
  • secure.opentek.de
Alternative Names
  • cclaussen.de
  • cjcl.de
  • claus-juergen-claussen.de
  • opentek.de
  • polycorn.de
  • porzellanmuenze.eu
  • porzellanmuenzen.de
  • secure.opentek.de
  • www.cjcl.de
  • www.claus-juergen-claussen.de
  • www.polycorn.de
  • www.porzellanmuenze.eu
  • www.porzellanmuenzen.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-08-31
Not valid after
2020-11-29
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
E4:E3:64:40:93:98:19:90:51:24:DF:70:B4:D5:37:28:4F:C1:11:28:26:ED:CF:09:03:C4:7E:63:39:BC:F4:38
SHA1
A2:DC:63:8D:68:E8:2C:91:4D:64:66:CE:BF:4A:6A:D2:ED:02:8C:B9
X509v3 extensions
subjectKeyIdentifier
  • 22:1D:F3:16:54:24:99:7D:37:06:05:5D:48:48:96:D9:4E:AD:E2:C3
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : E7:12:F2:B0:37:7E:1A:62:FB:8E:C9:0C:61:84:F1:EA:
  • 7B:37:CB:56:1D:11:26:5B:F3:E0:F3:4B:F2:41:54:6E
  • Timestamp : Aug 31 20:07:34.374 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:C4:AF:3A:89:26:F8:FA:A3:95:6C:B3:
  • 09:E0:5D:FD:14:4F:1B:68:E4:48:A6:4F:56:78:0B:1C:
  • 37:DE:6D:2A:40:02:21:00:F0:68:8B:6B:98:6C:6D:72:
  • F0:CD:B6:1C:B0:CE:A1:7C:38:F9:1B:8C:3F:D3:EB:DD:
  • 24:FF:D9:4C:B8:8D:C4:3E
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B2:1E:05:CC:8B:A2:CD:8A:20:4E:87:66:F9:2B:B9:8A:
  • 25:20:67:6B:DA:FA:70:E7:B2:49:53:2D:EF:8B:90:5E
  • Timestamp : Aug 31 20:07:34.364 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:98:00:E8:54:05:4D:2E:0A:66:27:44:
  • 9E:01:61:A7:71:84:4A:D5:24:B4:23:D9:3C:1B:19:38:
  • 13:02:6A:E8:DC:02:20:14:25:4B:DA:02:09:B4:CB:F7:
  • A3:91:59:E4:CE:6B:29:E0:36:96:39:65:51:9A:94:E2:
  • EA:65:A0:4D:E3:71:01