SSL-Tools

SSL check results of sig-io.nl

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Discover if the mail servers for sig-io.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 Sun, 28 Apr 2024 12:49:20 +0000

The mailservers of sig-io.nl can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @sig-io.nl addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.sig-io.nl
2a01:4f9:c012:a534::1
 10
supported
mail.sig-io.nl
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
mail.sig-io.nl
65.109.226.2
 10
supported
mail.sig-io.nl
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.sig-io.nl

Certificate chain
  • mail.sig-io.nl
    • 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.sig-io.nl
Alternative Names
  • mail.sig-io.nl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-04-28
Not valid after
2024-07-27
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
D2:C3:97:D4:E3:61:6B:41:E7:BC:A4:5D:66:A1:18:CA:51:23:62:0D:0C:3A:BE:03:70:E9:8A:77:D7:28:66:EF
SHA1
5D:33:94:44:3C:1F:80:A8:74:26:A5:AC:FB:AA:68:B7:76:05:80:5B
X509v3 extensions
subjectKeyIdentifier
  • BC:2A:0E:8A:AD:B6:6D:80:3D:9C:01:5D:D1:A6:40:62:8F:4B:26:70
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 : 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 28 11:52:39.272 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:46:92:33:3D:D7:03:63:56:4B:9D:25:94:
  • 15:E1:F7:66:53:99:ED:EF:3F:A4:5D:86:B8:1C:E2:85:
  • 0C:42:7B:B5:02:20:7F:3F:A7:06:3E:9C:3D:27:81:8E:
  • DE:C2:F7:A4:06:FE:B1:FD:54:32:0D:97:B1:47:B4:D3:
  • DC:DA:DA:F6:08:11
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : DF:E1:56:EB:AA:05:AF:B5:9C:0F:86:71:8D:A8:C0:32:
  • 4E:AE:56:D9:6E:A7:F5:A5:6A:01:D1:C1:3B:BE:52:5C
  • Timestamp : Apr 28 11:52:39.474 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:58:DD:3B:2B:48:EC:CA:E4:87:F5:DD:6A:
  • 6D:6F:82:C7:AC:DD:1C:F9:FA:01:29:EE:C8:B2:FF:6F:
  • 33:47:73:F9:02:21:00:C8:7D:12:AD:EB:58:A4:20:70:
  • DD:0E:3F:B0:C2:5B:DF:57:0C:1D:6D:4D:8B:82:A1:BD:
  • B4:BE:D5:2D:22:E8:CB

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.sig-io.nl
  • DANE-TA: Trust Anchor Assertion
  • Use subject public key
  • SHA-256 Hash
valid
valid
_25._tcp.mail.sig-io.nl
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
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