SSL-Tools

SSL check results of norbertguenther.de

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Discover if the mail servers for norbertguenther.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 Mon, 16 Feb 2026 11:17:11 +0000

We can not guarantee a secure connection to the mailservers of norbertguenther.de!

Please contact the operator of norbertguenther.de and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/norbertguenther.de

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.norbertguenther.de
212.102.225.4
Results incomplete
10
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s
mx20.oberberg.net
89.200.168.203
 20
supported
*.oberberg.net
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 @norbertguenther.de address so far. Test mail delivery

Certificates

First seen at:

CN=*.oberberg.net

Certificate chain
Subject
Common Name (CN)
  • *.oberberg.net
Alternative Names
  • *.oberberg.net
  • oberberg.net
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Organizational Unit (OU)
  • www.digicert.com
Common Name (CN)
  • Thawte TLS RSA CA G1
validity period
Not valid before
2025-12-15
Not valid after
2027-01-01
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
41:47:DB:A1:76:AC:60:7C:FA:0B:C2:02:AE:BD:A7:D3:F0:79:7F:47:CE:9D:B2:DA:38:1B:99:47:49:38:17:28
SHA1
23:8B:53:79:51:84:9B:8D:1D:9D:8A:7B:03:04:16:A9:ED:80:FA:A7
X509v3 extensions
authorityKeyIdentifier
  • keyid:A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
subjectKeyIdentifier
  • 50:3B:E7:A7:7E:FE:37:BF:52:E4:C9:4B:C3:CB:94:FD:D2:D8:34:E8
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • CPS: http://www.digicert.com/CPS
crlDistributionPoints
  • Full Name:
  • URI:http://cdp.thawte.com/ThawteTLSRSACAG1.crl
authorityInfoAccess
  • OCSP - URI:http://status.thawte.com
  • CA Issuers - URI:http://cacerts.thawte.com/ThawteTLSRSACAG1.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F:
  • AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26
  • Timestamp : Dec 15 09:16:29.147 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:1B:DF:41:30:83:15:A7:1C:50:E3:0D:DA:
  • CB:1F:40:BD:BE:9B:F4:25:99:9D:E1:5E:6C:27:CC:7E:
  • 41:F6:4F:36:02:20:5D:32:91:B4:3C:66:57:CE:D9:5D:
  • 10:46:AF:6B:DB:1A:C4:E4:D2:92:33:8F:E3:79:4D:66:
  • F6:D5:C7:09:6D:7F
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD:
  • DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F
  • Timestamp : Dec 15 09:16:29.135 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:D4:25:9F:5A:DD:6D:EB:BA:8C:81:66:
  • 6D:F7:7E:89:29:30:2A:17:80:D5:72:80:D4:45:06:CF:
  • BD:25:0D:48:64:02:20:56:43:21:0E:83:04:DE:DF:57:
  • 8C:3E:67:DF:FF:91:83:82:04:5D:F8:B4:07:F8:87:DB:
  • 08:4E:41:57:D3:4D:35
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99:
  • EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9
  • Timestamp : Dec 15 09:16:29.327 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:B0:FE:78:E5:AA:AD:88:80:E2:26:0E:
  • F7:98:5A:C0:8F:26:0F:A2:1D:8A:98:CF:E1:D7:82:AD:
  • 88:65:BC:6C:E7:02:20:24:A2:ED:77:E3:18:D9:BA:0C:
  • D3:DC:3B:D8:32:72:FD:DB:CA:E5:FF:F8:96:DE:26:EE:
  • 06:9B:95:F7:F8:FC:89