SSL-Tools

SSL check results of kubuk-kids.de

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Discover if the mail servers for kubuk-kids.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 Fri, 01 Aug 2025 00:31:27 +0000

The mailservers of kubuk-kids.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @kubuk-kids.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.kubuk-kids.de
193.177.165.95
 10
supported
kubuk-kids.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

CN=kubuk-kids.de

Certificate chain
  • kubuk-kids.de
    • remaining
    • 384 bit
    • ecdsa-with-SHA384
      • E5
        • remaining
        • 384 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • kubuk-kids.de
Alternative Names
  • ftp.kubuk-kids.de
  • kubuk-kids.de
  • mail.kubuk-kids.de
  • poczta.kubuk-kids.de
  • pop.kubuk-kids.de
  • smtp.kubuk-kids.de
  • www.kubuk-kids.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E5
validity period
Not valid before
2025-07-01
Not valid after
2025-09-29
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
81:90:0C:BC:C8:D0:04:51:46:C2:71:0C:C3:AD:DC:DD:13:CE:55:E8:25:6C:5C:D5:62:D2:91:16:8D:6E:A6:F2
SHA1
94:83:AD:1B:EC:95:7A:FB:A3:33:4E:25:D6:BA:9A:E8:99:DD:55:45
X509v3 extensions
subjectKeyIdentifier
  • 49:48:6E:77:AE:93:03:BE:EF:D3:AC:26:2E:EE:3C:76:6D:55:A6:12
authorityKeyIdentifier
  • keyid:9F:2B:5F:CF:3C:21:4F:9D:04:B7:ED:2B:2C:C4:C6:70:8B:D2:D7:0D
authorityInfoAccess
  • CA Issuers - URI:http://e5.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e5.c.lencr.org/36.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A4:42:C5:06:49:60:61:54:8F:0F:D4:EA:9C:FB:7A:2D:
  • 26:45:4D:87:A9:7F:2F:DF:45:59:F6:27:4F:3A:84:54
  • Timestamp : Jul 1 14:20:42.860 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:67:AF:26:52:A0:73:16:0A:EB:F7:FB:F0:
  • 52:79:07:FC:73:A6:12:66:71:5C:E1:AA:FA:D5:FA:09:
  • 8F:5C:67:61:02:21:00:89:62:56:BC:A3:41:C0:77:C8:
  • DC:77:3B:91:C3:A4:F5:78:2F:A6:AB:11:F4:F6:F3:6F:
  • 37:E3:D8:1F:50:5C:86
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 12:F1:4E:34:BD:53:72:4C:84:06:19:C3:8F:3F:7A:13:
  • F8:E7:B5:62:87:88:9C:6D:30:05:84:EB:E5:86:26:3A
  • Timestamp : Jul 1 14:20:42.962 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:59:3A:2A:9A:41:89:C7:A2:58:20:14:19:
  • D1:C2:42:F6:47:37:B0:95:A5:DD:42:96:49:23:35:DF:
  • DA:5A:7A:D6:02:20:77:BC:E8:64:D3:36:5E:9D:82:38:
  • E9:B7:F0:03:49:48:08:55:A3:F4:56:79:EA:CF:10:6E:
  • D5:59:DA:9D:1E:55