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SSL check results of cf.nlvl.uk

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Discover if the mail servers for cf.nlvl.uk 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, 17 May 2026 01:23:11 +0000

The mailservers of cf.nlvl.uk can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @cf.nlvl.uk addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
cf.nlvl.uk
51.38.92.186
 -
supported
cf.nlvl.uk
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

We have not received any emails from a @cf.nlvl.uk address so far. Test mail delivery

Certificates

First seen at:

CN=cf.nlvl.uk

Certificate chain
  • cf.nlvl.uk
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R13
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • cf.nlvl.uk
Alternative Names
  • cf.nlvl.uk
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R13
validity period
Not valid before
2026-05-17
Not valid after
2026-08-15
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
E8:5C:9E:C2:2B:5C:44:72:E1:83:0D:73:C5:AB:C6:A4:6C:DA:29:31:DD:99:CA:61:8D:51:65:91:60:67:08:89
SHA1
D4:74:2C:FC:2D:45:50:31:D5:51:9F:3A:96:AD:D7:99:EB:4D:E4:81
X509v3 extensions
subjectKeyIdentifier
  • D2:55:BD:EF:30:2F:A7:37:F1:E1:B1:1A:8D:7C:2D:5B:9E:DD:96:C1
authorityKeyIdentifier
  • keyid:E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
authorityInfoAccess
  • CA Issuers - URI:http://r13.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r13.c.lencr.org/29.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 46:AF:86:3D:3B:3E:E5:9F:A5:77:DE:A8:24:5D:36:B0:
  • D9:ED:22:A2:23:F4:61:77:41:22:94:52:EE:95:50:5F
  • Timestamp : May 17 01:21:59.130 2026 GMT
  • Extensions: 00:00:05:00:06:D0:BB:4D
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:49:DD:CE:F8:AB:93:AC:4E:CF:E3:5D:E2:
  • 7D:50:39:CB:91:1E:4C:15:F3:74:AB:76:F2:86:63:13:
  • 90:82:33:21:02:20:36:BD:73:F0:D0:88:68:ED:B4:B6:
  • 3C:7F:08:DB:B5:94:94:85:FE:0B:40:9D:6F:C4:AB:DF:
  • 2C:43:64:AD:28:BF
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9:
  • 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77
  • Timestamp : May 17 01:21:59.000 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:7A:6B:14:40:7C:28:46:68:E5:C6:84:A9:
  • 25:72:57:68:04:C8:B3:29:C6:78:49:41:0A:1C:3A:90:
  • 1D:9D:B9:42:02:21:00:C4:07:00:D4:F6:46:D7:3F:25:
  • 64:94:25:3F:21:48:70:EE:95:CA:71:8E:61:F2:2F:B0:
  • FC:D3:7F:EC:71:D1:00