SSL-Tools

SSL check results of c4to.nl

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Discover if the mail servers for c4to.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, 28 Feb 2024 16:17:40 +0000

We can not guarantee a secure connection to the mailservers of c4to.nl!

Please contact the operator of c4to.nl and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/c4to.nl

Servers

Incoming Mails

These servers are responsible for incoming mails to @c4to.nl addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.c4to.nl
95.216.227.58
Results incomplete
10
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s
mail2.c4to.nl
88.99.99.224
 20
supported
mail2.c4to.nl
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s

Outgoing Mails

We have not received any emails from a @c4to.nl address so far. Test mail delivery

Certificates

First seen at:

CN=mail2.c4to.nl

Certificate chain
  • mail2.c4to.nl
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Unknown Authority
      R3
Subject
Common Name (CN)
  • mail2.c4to.nl
Alternative Names
  • mail2.c4to.nl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-01-08
Not valid after
2024-04-07
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
D8:56:2A:E7:FB:D8:F7:5C:BE:C3:CF:D5:98:80:16:19:F4:45:B1:FD:3E:28:41:88:58:51:38:B5:D4:F9:65:B6
SHA1
8D:16:36:20:A1:1E:A7:E3:0B:2C:8C:59:69:8B:72:6F:81:3F:C1:34
X509v3 extensions
subjectKeyIdentifier
  • 42:F5:3A:F4:1C:A3:D1:07:BE:DB:99:8A:45:92:A6:7E:9A:6F:4F:0C
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 : 3B:53:77:75:3E:2D:B9:80:4E:8B:30:5B:06:FE:40:3B:
  • 67:D8:4F:C3:F4:C7:BD:00:0D:2D:72:6F:E1:FA:D4:17
  • Timestamp : Jan 8 23:05:52.146 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:27:A0:2E:2B:48:AF:7D:07:43:BC:E9:19:
  • 85:0C:21:4E:CB:8C:4A:52:C5:A4:B9:5B:02:BD:44:4E:
  • B3:D5:07:91:02:20:3D:4F:F4:D5:30:76:04:2D:03:91:
  • D6:F8:39:D8:F8:3A:EB:B2:48:3A:74:20:D2:A1:59:A6:
  • 68:56:D6:46:30:0F
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 29:D0:3A:1B:B6:74:AA:71:1C:D3:03:5B:65:57:C1:4F:
  • 8A:A7:8B:4F:E8:38:94:49:EC:A4:53:F9:44:BD:24:68
  • Timestamp : Jan 8 23:05:52.342 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:EB:3F:B3:67:A2:6D:92:C0:18:01:76:
  • 3E:BC:10:D6:01:8F:86:65:AB:C6:A1:4D:CD:D6:0A:48:
  • FF:05:2C:69:1B:02:21:00:94:90:D9:4A:C1:CB:AC:81:
  • D9:2F:25:FD:5B:E6:36:57:8B:A5:C3:27:1D:D0:DF:88:
  • EF:8D:FA:34:4A:21:79:AC