SSL check results of s03.knoop.nl

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Discover if the mail servers for s03.knoop.nl 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

Report created Sat, 21 Nov 2020 15:52:19 +0000

We can not guarantee a secure connection to the mailservers of s03.knoop.nl!

Please contact the operator of s03.knoop.nl and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/s03.knoop.nl

Servers

Incoming Mails

These servers are responsible for incoming mails to @s03.knoop.nl addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
pop.knoop.nl
94.237.41.22
10
supported
s03.knoop.nl
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
supported
  • SSL_RSA_WITH_RC4_128_SHA
  • TLSv1.2
  • SSLv3
2 s
fallback.mail.knoop.nl
213.206.86.50
Results incomplete
30
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s

Outgoing Mails

We have not received any emails from a @s03.knoop.nl address so far. Test mail delivery

Certificates

First seen at:

CN=s03.knoop.nl

Certificate chain
  • s03.knoop.nl
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch

Subject
Common Name (CN)
  • s03.knoop.nl
Alternative Names
  • s03.knoop.nl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-10-22
Not valid after
2021-01-20
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
F0:FF:7B:C9:B0:10:47:CF:89:71:7B:F6:33:C4:70:91:35:18:E8:4F:DC:16:D7:9F:40:8F:59:4B:48:A0:D8:8A
SHA1
F9:FE:96:F6:09:B3:6C:CC:C7:9B:36:67:6F:CB:09:3A:59:9C:76:E0
X509v3 extensions
subjectKeyIdentifier
  • 26:D9:8D:75:C8:79:AF:D3:84:0E:02:8B:AC:F9:D5:F1:5D:EE:5F:75
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 7D:3E:F2:F8:8F:FF:88:55:68:24:C2:C0:CA:9E:52:89:
  • 79:2B:C5:0E:78:09:7F:2E:6A:97:68:99:7E:22:F0:D7
  • Timestamp : Oct 22 14:52:26.754 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:29:7D:64:76:9C:8F:6B:D5:81:86:51:9C:
  • 5D:13:3E:F5:83:18:E4:66:94:6D:F0:9D:41:A0:81:59:
  • 59:82:C4:6F:02:20:22:AB:EB:2F:14:AD:A6:56:EA:B0:
  • F6:2C:91:9D:62:00:B7:5D:4D:B9:9B:9C:0B:6F:C5:9F:
  • C5:DF:5B:90:BE:BF
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77:
  • 15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13
  • Timestamp : Oct 22 14:52:26.876 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:A2:71:05:86:89:C7:22:67:DE:37:7F:
  • 63:57:31:12:5A:5A:0A:43:B2:48:A7:8B:81:E6:7F:37:
  • CA:AD:1B:AC:DD:02:21:00:B9:19:90:80:1B:EB:91:DF:
  • 59:59:53:AD:D3:71:DF:94:8E:C4:F2:42:47:61:7C:7B:
  • A6:A6:40:4B:E0:B3:C6:14