SSL-Tools

SSL check results of kozon.sk

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Discover if the mail servers for kozon.sk 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 Sun, 07 Jun 2026 00:30:33 +0000

The mailservers of kozon.sk can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @kozon.sk addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx1.fluxiolabs.dev
135.181.176.20
 10
supported
*.fluxiolabs.dev
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
3 s

Outgoing Mails

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

Certificates

First seen at:

CN=*.fluxiolabs.dev

Certificate chain
  • *.fluxiolabs.dev
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • E7
        • remaining
        • 384 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • *.fluxiolabs.dev
Alternative Names
  • *.fluxiolabs.dev
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E7
validity period
Not valid before
2026-05-21
Not valid after
2026-08-19
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
09:33:3F:8B:C1:5E:B9:96:09:5B:94:76:CF:E2:A4:E2:28:9A:24:8E:8C:E2:1E:51:C1:1E:41:54:2F:F7:CA:FC
SHA1
EF:E7:B2:73:BA:CF:CA:8F:6A:CF:89:C6:A9:9D:99:EB:39:9F:BD:11
X509v3 extensions
subjectKeyIdentifier
  • BC:54:78:8A:6B:62:B7:EF:0C:C9:6E:D9:6E:A7:8E:00:4F:84:D5:86
authorityKeyIdentifier
  • keyid:AE:48:9E:DC:87:1D:44:A0:6F:DA:A2:E5:60:74:04:78:C2:9C:00:80
authorityInfoAccess
  • CA Issuers - URI:http://e7.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e7.c.lencr.org/97.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E:
  • F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7
  • Timestamp : May 21 07:41:16.891 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:11:D3:49:D8:EC:73:4C:E9:87:C7:3C:84:
  • 38:F8:4E:1E:A3:39:7D:27:3D:48:BB:B1:1E:2D:05:0A:
  • 8F:49:6E:30:02:20:49:A8:A5:92:5E:9B:AD:5B:1E:1D:
  • CE:96:92:C9:3A:FD:7B:87:23:8D:B3:D7:75:87:F9:E2:
  • A1:7A:87:E3:AF:E4
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86:
  • D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF
  • Timestamp : May 21 07:41:17.701 2026 GMT
  • Extensions: 00:00:05:00:15:22:81:01
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:DE:9E:67:01:40:D7:90:D0:B3:4F:40:
  • 93:1E:BF:D8:86:AE:53:52:75:7F:65:E7:95:39:47:C3:
  • 38:04:FD:6D:8D:02:20:30:64:0E:C4:FE:3C:B2:F5:55:
  • 51:DA:00:8B:77:0B:99:9A:43:53:04:27:E2:23:D5:51:
  • 16:D8:CA:2B:79:18:87