SSL-Tools

SSL check results of mail.otto-theobald.de

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Discover if the mail servers for mail.otto-theobald.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 Sun, 26 Apr 2026 00:30:30 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.otto-theobald.de
85.220.128.99
 -
supported
aurumfactura.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
9 s

Outgoing Mails

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

Certificates

First seen at:

CN=aurumfactura.de

Certificate chain
  • aurumfactura.de
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R13
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • aurumfactura.de
Alternative Names
  • aurumfactura.de
  • beta.kuvertshop.com
  • cyberdom.org
  • cyqueryui.cyberdom.org
  • die-plattnerey.de
  • gebhard-mueller.de
  • hh-druck.de
  • klimt-art.de
  • kuvertshop.com
  • mail.cyberdom.org
  • mail.otto-theobald.de
  • otto-theobald.de
  • postzustellungsauftrag.com
  • www.das-mailinghaus.com
  • www.hh-druck.de
  • www.kuvertshop.com
  • www.otto-theobald.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R13
validity period
Not valid before
2026-04-23
Not valid after
2026-07-22
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
B4:E8:48:17:AC:C3:65:5A:CC:EA:B1:99:94:70:6A:04:1F:47:C4:15:77:EF:F2:F8:6D:32:E5:CE:55:1D:0D:39
SHA1
B0:A2:C1:AB:E3:85:F5:43:28:CB:AA:F6:63:D4:D0:9B:70:A3:B2:1F
X509v3 extensions
subjectKeyIdentifier
  • CD:3F:87:23:05:D6:6D:71:83:5B:49:16:7D:B6:AF:65:14:2A:4F:65
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/45.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB:
  • B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14
  • Timestamp : Apr 23 11:13:17.738 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:42:18:B2:45:32:AE:A2:EF:45:97:05:D9:
  • EA:8D:E0:D8:BA:CD:F2:73:40:DD:3B:22:3A:52:EC:F9:
  • 2A:5C:4E:20:02:20:3A:46:D3:75:6C:EA:08:D8:70:D7:
  • 6C:FB:83:FC:1A:6D:26:3B:69:66:6D:6B:88:98:64:19:
  • 77:FF:D1:E1:78:43
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9:
  • 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A
  • Timestamp : Apr 23 11:13:18.150 2026 GMT
  • Extensions: 00:00:05:00:08:65:35:98
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:7E:9E:21:49:07:2E:1C:32:D7:43:B2:0E:
  • 19:41:83:F2:18:2B:F8:06:BE:2C:BD:15:24:69:90:ED:
  • 1A:75:E2:07:02:20:75:7C:40:BF:26:67:20:2B:39:F0:
  • 3D:F1:E4:81:6D:7C:FE:D9:CB:4B:23:91:07:3A:8A:B4:
  • F2:7B:6E:8E:D8:D5