SSL-Tools

SSL check results of coool.dk

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Discover if the mail servers for coool.dk 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 Tue, 23 Apr 2024 16:49:23 +0000

The mailservers of coool.dk can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @coool.dk addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.coool.dk
172.104.248.26
 10
supported
mail.coool.dk
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 @coool.dk address so far. Test mail delivery

Certificates

First seen at:

CN=mail.coool.dk

Certificate chain
  • mail.coool.dk
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.coool.dk
Alternative Names
  • mail.coool.dk
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-04-23
Not valid after
2024-07-22
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
96:DF:66:B0:E3:1B:A2:72:F4:3D:68:79:EB:EB:EA:81:FE:AB:27:CA:A6:7F:5D:2C:CE:0E:98:7C:2E:B3:93:D5
SHA1
16:1C:1F:D5:AF:B7:56:1E:41:65:F9:4E:D8:94:5D:79:B3:83:76:CD
X509v3 extensions
subjectKeyIdentifier
  • 12:7D:8B:CA:F4:C2:2A:B2:FF:74:5D:8D:F2:C1:5A:87:FF:21:44:41
authorityKeyIdentifier
  • keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
  • OCSP - URI:http://r3.o.lencr.org
  • CA Issuers - URI:http://r3.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : EE:CD:D0:64:D5:DB:1A:CE:C5:5C:B7:9D:B4:CD:13:A2:
  • 32:87:46:7C:BC:EC:DE:C3:51:48:59:46:71:1F:B5:9B
  • Timestamp : Apr 23 12:17:51.089 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:AB:C4:E3:05:91:08:11:30:C3:A8:87:
  • 53:2B:10:5F:79:C0:D3:95:B3:D2:67:FA:A7:81:EC:1F:
  • 12:3F:CF:DF:C1:02:20:68:5D:36:75:33:BE:CC:9F:A1:
  • 91:5C:E1:34:3D:82:F7:BE:CA:F3:80:01:46:30:90:89:
  • 4B:2E:60:CE:D0:D9:EA
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 48:B0:E3:6B:DA:A6:47:34:0F:E5:6A:02:FA:9D:30:EB:
  • 1C:52:01:CB:56:DD:2C:81:D9:BB:BF:AB:39:D8:84:73
  • Timestamp : Apr 23 12:17:51.133 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:02:10:E5:51:83:9E:23:0C:5C:13:46:03:
  • 1C:AD:01:D2:3C:6B:97:2C:4F:13:C6:D0:64:7F:31:11:
  • F2:EB:6A:FD:02:21:00:CB:BC:45:A3:D4:1D:83:6E:D1:
  • 78:3C:F4:C0:FF:24:F4:87:E8:82:14:11:BE:0F:4B:5F:
  • 9F:CA:78:D0:9A:D9:52