SSL-Tools

SSL check results of dtnvrn.de

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Discover if the mail servers for dtnvrn.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 Sat, 15 Feb 2025 14:26:23 +0000

The mailservers of dtnvrn.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @dtnvrn.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.dtnvrn.de
194.13.83.17
 5
supported
mail.dtnvrn.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.dtnvrn.de

Certificate chain
  • mail.dtnvrn.de
    • remaining
    • 3072 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.dtnvrn.de
Alternative Names
  • imap.dtnvrn.de
  • mail.dtnvrn.de
  • smtp.dtnvrn.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2025-01-26
Not valid after
2025-04-26
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
9E:1F:AE:5F:5F:68:8A:62:E9:1A:88:D0:B0:5B:5A:07:FA:74:20:E0:E6:42:A1:9E:02:96:E7:13:F0:91:9C:B4
SHA1
CE:C2:37:FC:6A:7A:07:D9:FE:C0:B7:09:F1:02:CA:37:05:D0:61:AB
X509v3 extensions
subjectKeyIdentifier
  • 76:7A:16:22:DE:B4:DF:F1:04:69:9B:09:F1:3F:5E:9C:ED:BC:A3:6F
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 : 73:20:22:0F:08:16:8A:F9:F3:C4:A6:8B:0A:B2:6A:9A:
  • 4A:00:EE:F5:77:85:8A:08:4D:05:00:D4:A5:42:44:59
  • Timestamp : Jan 26 23:06:58.388 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:82:B9:1C:02:ED:08:1C:17:90:A2:DE:
  • 10:7E:85:56:FC:C7:8B:E5:C3:5A:A3:6E:08:E8:76:1A:
  • DA:4D:02:97:D5:02:21:00:CA:7B:CB:D3:B3:96:B8:31:
  • 4B:24:49:5A:C0:7D:F7:D2:0F:EE:7F:2C:7A:32:BC:07:
  • 98:8B:22:BE:C8:B2:AF:6D
  • 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 26 23:06:58.394 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:B8:85:3C:92:B3:32:3A:B4:07:7D:26:
  • 9E:27:8E:C7:5E:8F:F7:7D:CE:9C:03:EC:4F:B6:30:3A:
  • 75:2D:E7:59:2A:02:20:5A:62:FF:75:15:C8:09:BA:24:
  • DA:6C:ED:B8:B8:4B:57:65:EC:C4:E6:82:66:78:0A:65:
  • DA:81:DA:8E:45:6A:06