SSL-Tools

SSL check results of mx.cfainstitute.windmill.dev

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Discover if the mail servers for mx.cfainstitute.windmill.dev 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 Mon, 16 Feb 2026 17:44:00 +0000

The mailservers of mx.cfainstitute.windmill.dev can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @mx.cfainstitute.windmill.dev addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx.cfainstitute.windmill.dev
52.71.156.172
 50
supported
mx.cfainstitute.windmill.dev
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
5 s

Outgoing Mails

We have not received any emails from a @mx.cfainstitute.windmill.dev address so far. Test mail delivery

Certificates

First seen at:

CN=mx.cfainstitute.windmill.dev

Certificate chain
  • mx.cfainstitute.windmill.dev
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R12
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mx.cfainstitute.windmill.dev
Alternative Names
  • mx.cfainstitute.windmill.dev
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R12
validity period
Not valid before
2026-02-16
Not valid after
2026-05-17
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
9B:7A:A8:13:E3:7F:98:3B:F4:B1:CF:1C:D6:D0:99:C3:6C:1A:76:3B:45:48:07:C9:D7:F3:B1:63:F2:0E:73:D2
SHA1
F6:8A:D4:BE:42:A3:11:15:13:5A:FE:3A:75:16:7D:0C:29:2A:94:64
X509v3 extensions
subjectKeyIdentifier
  • 6E:B3:B4:2F:1E:5B:E7:BF:BB:2E:92:C7:0F:18:AE:1A:65:6C:9F:FC
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/84.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D1:6E:A9:A5:68:07:7E:66:35:A0:3F:37:A5:DD:BC:03:
  • A5:3C:41:12:14:D4:88:18:F5:E9:31:B3:23:CB:95:04
  • Timestamp : Feb 16 17:20:39.904 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:88:5D:C1:F9:49:52:1C:DB:AE:94:32:
  • 1B:4E:30:9D:FE:C9:CD:52:5E:20:C8:F5:0C:9F:DB:FC:
  • 81:E4:A1:6B:94:02:21:00:F2:FF:86:A7:1E:2E:96:F7:
  • 7B:9B:29:93:60:35:F8:F1:0A:AA:7A:47:54:E0:AC:66:
  • C5:64:83:8B:BE:07:C3:F3
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A5:C9:78:92:5D:57:46:17:82:87:0D:D8:89:66:0B:5C:
  • 55:64:8B:7D:00:40:F2:EC:07:68:51:D1:88:69:19:F7
  • Timestamp : Feb 16 17:20:40.285 2026 GMT
  • Extensions: 00:00:05:00:32:69:03:15
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:2A:E7:84:8E:38:F2:04:B7:72:69:ED:8A:
  • 82:E0:34:25:2F:5E:67:F0:94:E5:41:62:2E:00:E9:40:
  • D9:55:3B:33:02:21:00:C9:B0:09:0E:8E:E6:EE:12:82:
  • 64:CC:FF:F5:14:0D:02:42:61:9B:72:5A:F6:4E:C5:41:
  • B0:52:64:95:8F:69:5C