SSL-Tools

SSL check results of dkinc.de

NEW You can also bulk check multiple servers.

Discover if the mail servers for dkinc.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 Wed, 21 May 2025 17:50:50 +0000

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

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

/mailservers/dkinc.de

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.dkinc.de
fe80::a8c0:aeff:fea3:28f5
Results incomplete
10 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s
mail.dkinc.de
88.218.227.11
 10
supported
dkinc.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
mail1.dkinc.de
88.218.227.11
 20
supported
dkinc.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 @dkinc.de address so far. Test mail delivery

Certificates

First seen at:

CN=dkinc.de

Certificate chain
  • dkinc.de
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • dkinc.de
Alternative Names
  • chess.dkinc.de
  • cloud.dkinc.de
  • dkinc.de
  • mail.dkinc.de
  • mail1.dkinc.de
  • www.chess.dkinc.de
  • www.dkinc.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2025-04-07
Not valid after
2025-07-06
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
C0:29:29:38:D4:CA:86:8B:34:88:B0:F7:7A:8A:CB:E6:0B:B1:1C:8F:FA:AB:35:34:DD:82:89:03:DE:B7:A6:84
SHA1
FB:84:67:2F:D0:03:F3:92:99:CB:6C:8D:37:F3:6A:74:EF:A3:D9:84
X509v3 extensions
subjectKeyIdentifier
  • D9:85:39:69:ED:31:0B:B8:C6:64:2F:99:B6:63:7E:64:23:15:FE:28
authorityKeyIdentifier
  • keyid:C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
  • OCSP - URI:http://r11.o.lencr.org
  • CA Issuers - URI:http://r11.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r11.c.lencr.org/101.crl
ct_precert_scts
  • 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 : Apr 7 16:51:12.648 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:9B:84:D3:7B:F6:57:77:5A:B7:C0:8C:
  • C0:C9:42:B6:04:00:FC:9E:92:43:A0:60:55:48:E6:46:
  • AA:93:63:F5:68:02:21:00:DB:17:61:28:BF:EA:09:A7:
  • E1:AA:C9:D3:27:0E:5B:FE:AE:49:F5:E8:08:79:43:C2:
  • 01:50:5E:20:52:5D:D5:6F
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A2:E3:0A:E4:45:EF:BD:AD:9B:7E:38:ED:47:67:77:53:
  • D7:82:5B:84:94:D7:2B:5E:1B:2C:C4:B9:50:A4:47:E7
  • Timestamp : Apr 7 16:51:14.586 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:AD:DD:18:48:91:E9:D7:8B:D9:4D:C8:
  • 85:EC:69:49:86:76:00:D8:61:59:70:F4:7D:81:C5:7E:
  • B0:DC:C6:C7:D7:02:21:00:F0:DB:E6:E1:D4:B2:4E:1A:
  • 43:B0:5D:9B:90:8E:78:E3:C4:47:C5:17:BF:68:EA:A0:
  • 80:77:EA:CD:EB:34:89:20