SSL-Tools

SSL check results of winter-strom.de

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Discover if the mail servers for winter-strom.de 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 Fri, 14 Mar 2025 01:34:13 +0000

The mailservers of winter-strom.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @winter-strom.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.winter-strom.de
2a01:239:32e:c100::
 10
supported
winter-strom.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
mail.winter-strom.de
212.227.143.87
 10
supported
winter-strom.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

We have not received any emails from a @winter-strom.de address so far. Test mail delivery

Certificates

First seen at:

CN=winter-strom.de

Certificate chain
  • winter-strom.de
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • winter-strom.de
Alternative Names
  • *.winter-strom.de
  • winter-strom.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2025-01-21
Not valid after
2025-04-21
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
70:53:5C:17:20:FD:77:8C:D1:32:8D:A7:04:40:99:07:18:28:DA:F6:41:E0:14:31:B5:68:2E:D0:76:F5:23:13
SHA1
F9:7C:20:69:BC:D5:FB:37:35:34:61:8B:B5:BC:3E:D1:C1:BC:00:44
X509v3 extensions
subjectKeyIdentifier
  • 47:2F:C7:80:E1:35:A3:35:A0:CE:82:E1:CC:C4:A3:6E:11:80:CE:59
authorityKeyIdentifier
  • keyid:C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
  • OCSP - URI:http://r11.o.lencr.org
  • CA Issuers - URI:http://r11.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A2:E3:0A:E4:45:EF:BD:AD:9B:7E:38:ED:47:67:77:53:
  • D7:82:5B:84:94:D7:2B:5E:1B:2C:C4:B9:50:A4:47:E7
  • Timestamp : Jan 21 01:44:49.769 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:A5:79:D9:1C:B2:55:62:C9:7C:08:C9:
  • 44:DB:61:46:18:32:FF:D6:D9:15:6E:25:94:D8:0B:E6:
  • C1:42:67:40:83:02:20:29:24:BD:02:5A:37:F7:99:A5:
  • D7:E3:6C:0A:CF:99:7D:C5:55:02:C9:16:62:2F:D3:C5:
  • 9A:CC:72:66:BA:9B:96
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 7D:59:1E:12:E1:78:2A:7B:1C:61:67:7C:5E:FD:F8:D0:
  • 87:5C:14:A0:4E:95:9E:B9:03:2F:D9:0E:8C:2E:79:B8
  • Timestamp : Jan 21 01:44:49.786 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:FD:88:0F:12:59:D4:41:59:6C:44:85:
  • 83:FD:6B:E7:CD:EB:17:4A:51:62:60:8E:7B:41:2E:13:
  • 28:97:DF:73:26:02:21:00:EB:1B:05:7E:9C:BD:2A:D6:
  • 14:6F:C7:E5:28:D6:A4:BB:5B:35:33:C0:37:BC:FC:A2:
  • 1A:F9:9D:D1:31:59:02:98

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.winter-strom.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
valid
valid