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SSL check results of niehnus.de

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Discover if the mail servers for niehnus.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

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Report created Mon, 06 Oct 2025 08:17:49 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.niehnus.de
92.205.230.103
 10
supported
mail.niehnus.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.niehnus.de

Certificate chain
  • mail.niehnus.de
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R13
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.niehnus.de
Alternative Names
  • mail.niehnus.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R13
validity period
Not valid before
2025-09-03
Not valid after
2025-12-02
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
8B:33:4F:02:6D:DD:81:85:A2:D7:66:F2:26:2E:31:86:AF:18:02:08:B8:6E:FA:10:E0:0F:5A:73:8C:B0:06:DC
SHA1
60:66:C6:53:9A:C7:EE:C7:86:5C:02:0B:28:DF:60:9E:EC:30:8F:A8
X509v3 extensions
subjectKeyIdentifier
  • 49:57:88:5A:BF:AB:1D:6B:78:7E:24:32:1D:B3:68:6B:CA:40:E4:5E
authorityKeyIdentifier
  • keyid:E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
authorityInfoAccess
  • CA Issuers - URI:http://r13.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r13.c.lencr.org/21.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
  • 22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
  • Timestamp : Sep 3 09:38:11.942 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:30:88:1D:48:F8:1C:AE:F6:10:F3:AF:F3:
  • 7F:6F:67:2D:57:03:8D:9B:97:95:6F:81:F8:C7:DF:79:
  • 5F:94:4B:2D:02:21:00:E2:D5:D9:5D:32:C2:A8:6E:62:
  • 2A:51:A7:CB:70:1B:6B:BA:6A:24:24:9F:18:5B:05:F6:
  • D6:49:D4:CD:9C:99:8E
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : DD:DC:CA:34:95:D7:E1:16:05:E7:95:32:FA:C7:9F:F8:
  • 3D:1C:50:DF:DB:00:3A:14:12:76:0A:2C:AC:BB:C8:2A
  • Timestamp : Sep 3 09:38:11.955 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:6A:5F:DA:34:E4:AE:53:ED:0F:CF:D6:B3:
  • AA:82:CF:A3:AC:34:24:3D:68:F5:BD:AF:7B:5D:31:8E:
  • 65:10:1C:72:02:20:12:6F:5D:2D:36:60:18:E2:7A:85:
  • 35:65:CC:8B:59:CF:AC:F7:A0:72:B1:36:57:B1:6F:3F:
  • 16:37:1E:D0:BA:FE