SSL-Tools

SSL check results of jakob-otto.de

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Discover if the mail servers for jakob-otto.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 Tue, 16 Apr 2024 13:57:03 +0000

The mailservers of jakob-otto.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @jakob-otto.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.jakob-otto.de
173.212.206.171
 10
supported
jakob-otto.de
DANE
errors
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=jakob-otto.de

Certificate chain
  • jakob-otto.de
    • remaining
    • 256 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • jakob-otto.de
Alternative Names
  • *.jakob-otto.de
  • jakob-otto.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-04-16
Not valid after
2024-07-15
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
50:49:DD:52:D0:8C:C7:40:85:D2:6A:FB:76:61:F4:2A:49:23:3C:8B:31:2F:96:8A:CB:E3:3F:15:E2:80:0D:E8
SHA1
C2:62:EB:D7:ED:1A:86:A5:8D:C7:78:F0:5F:9A:EA:F5:3F:C7:EE:CE
X509v3 extensions
subjectKeyIdentifier
  • 33:DA:01:64:74:6A:0A:05:C9:6C:AC:A7:D6:DD:B6:D4:F9:9A:73:3E
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 16 13:49:47.293 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:93:08:F7:C5:87:3B:1F:9E:4B:2D:5E:
  • AE:0B:32:DE:B4:1B:B0:70:86:4B:C0:65:16:D2:4B:D9:
  • 08:68:DF:8B:A2:02:20:45:E1:E6:06:63:BC:25:D8:95:
  • EC:BD:CB:04:0F:0A:FE:63:CF:00:58:AF:30:5C:AE:5D:
  • 91:52:31:6F:ED:4E:DB
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 19:98:10:71:09:F0:D6:52:2E:30:80:D2:9E:3F:64:BB:
  • 83:6E:28:CC:F9:0F:52:8E:EE:DF:CE:4A:3F:16:B4:CA
  • Timestamp : Apr 16 13:49:47.319 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:EC:C9:6F:2F:55:36:D3:09:70:C7:47:
  • D7:07:86:69:3C:40:52:B0:10:F3:6E:69:79:AF:DF:F8:
  • DF:87:CA:3D:ED:02:20:45:75:84:46:E2:01:11:F9:D5:
  • 07:B4:42:91:89:E8:7A:20:5E:70:58:7B:2B:51:C6:98:
  • FD:7C:F8:06:94:72:23

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