SSL-Tools

SSL check results of testmett.nl

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Discover if the mail servers for testmett.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

JSON Refresh

Report created Wed, 15 Oct 2025 00:30:14 +0000

The mailservers of testmett.nl can be reached through an encrypted connection.

However, we found problems that may affect the security.

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.doorstuurserver.nl
2001:678:be4:8::19
 10
supported
doorstuurserver.nl
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
11 s
mail.doorstuurserver.nl
87.239.8.19
 10
supported
doorstuurserver.nl
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
12 s

Outgoing Mails

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

Certificates

First seen at:

CN=doorstuurserver.nl

Certificate chain
  • doorstuurserver.nl
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch
      • R12
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • doorstuurserver.nl
Alternative Names
  • doorstuurserver.nl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R12
validity period
Not valid before
2025-09-01
Not valid after
2025-11-30
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
B5:A8:48:80:4D:EA:9F:56:EE:57:33:9A:0B:6F:35:24:40:F3:B0:6F:42:CD:2B:CE:86:DA:1B:08:9E:97:74:E3
SHA1
14:A9:AA:C5:27:85:F0:2F:B9:72:36:51:DD:F6:45:65:CB:B2:B8:4B
X509v3 extensions
subjectKeyIdentifier
  • 20:F3:39:2C:F1:37:AB:08:A0:18:A1:B8:63:4F:D3:42:8A:3D:76:22
authorityKeyIdentifier
  • keyid:00:B5:29:F2:2D:8E:6F:31:E8:9B:4C:AD:78:3E:FA:DC:E9:0C:D1:D2
authorityInfoAccess
  • CA Issuers - URI:http://r12.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r12.c.lencr.org/29.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 : Sep 1 07:17:23.269 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:2E:BC:55:6D:AD:97:A6:47:2E:4A:A9:68:
  • DC:2B:5C:46:8A:44:82:AE:9A:E5:09:70:F5:A2:F7:77:
  • F0:3E:40:83:02:21:00:88:DA:CF:EB:28:56:2A:84:C7:
  • CB:9E:E2:2B:C4:6E:58:7B:0A:06:23:5F:07:D4:D5:EE:
  • B3:17:83:FD:22:84:69
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4:
  • 67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D
  • Timestamp : Sep 1 07:17:23.287 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:9A:1C:A7:88:C4:F4:99:92:C5:DA:BD:
  • 84:CC:79:2C:01:81:A9:88:6E:B9:96:DD:61:44:29:3A:
  • 96:C1:9D:22:C6:02:20:29:5F:70:85:80:88:E5:81:C0:
  • 5E:D8:D3:71:F3:D3:9E:21:88:31:9B:37:16:F2:24:0C:
  • 61:2A:E9:27:AA:D8:1F

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.mail.doorstuurserver.nl
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
valid