SSL-Tools

SSL check results of kvt-group.de

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Discover if the mail servers for kvt-group.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, 06 Oct 2020 09:51:56 +0000

The mailservers of kvt-group.de can be reached through an encrypted connection.

However, we found problems that may affect the security.

Servers

Incoming Mails

These servers are responsible for incoming mails to @kvt-group.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.kvt-group.de
85.16.75.55
 10
supported
services.kvt-group.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
12 s

Outgoing Mails

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

Certificates

First seen at:

CN=services.kvt-group.de

Certificate chain
  • services.kvt-group.de
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Unknown Authority
      Let's Encrypt Authority X3
Subject
Common Name (CN)
  • services.kvt-group.de
Alternative Names
  • archive.kvt-group.de
  • autodiscover.kvt-group.de
  • cloud.kvt-group.de
  • jitsi.kvt-group.de
  • mail.kvt-group.de
  • rds.kvt-group.de
  • services.kvt-group.de
  • sympa.kvt-group.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-10-05
Not valid after
2021-01-03
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
45:13:E5:CC:CB:2F:24:81:20:29:29:B9:95:FE:92:98:3D:70:7F:18:4D:65:19:49:E8:CC:01:6C:7C:37:5D:A4
SHA1
C4:6A:25:34:94:48:8E:05:FE:C3:2C:64:BE:3F:DB:B5:E8:9D:C7:64
X509v3 extensions
subjectKeyIdentifier
  • 34:5C:55:F0:E0:7C:3D:C0:2A:34:92:1A:FC:12:4B:83:54:E1:AF:BA
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 94:20:BC:1E:8E:D5:8D:6C:88:73:1F:82:8B:22:2C:0D:
  • D1:DA:4D:5E:6C:4F:94:3D:61:DB:4E:2F:58:4D:A2:C2
  • Timestamp : Oct 5 13:20:58.811 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:B8:82:E2:61:25:81:1A:1C:77:8F:32:
  • F7:31:20:6C:7D:99:FE:4A:B4:DA:54:E7:5B:B9:1C:A7:
  • F6:7D:EA:41:31:02:20:1E:C3:D2:AF:8F:14:87:41:B6:
  • 1C:FF:19:BC:06:F9:69:7E:60:D1:AB:95:4A:5A:37:E4:
  • 60:E5:71:E0:05:3E:33
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
  • E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
  • Timestamp : Oct 5 13:20:58.805 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:DD:6A:59:30:EB:E9:FD:00:2C:FB:BD:
  • B8:EB:16:7E:74:26:12:E4:A8:14:67:70:EA:3F:F8:5F:
  • AE:37:E5:58:0E:02:21:00:A1:71:C8:26:5F:01:11:CB:
  • 66:64:93:E2:42:9C:E2:57:D9:AD:19:01:56:A9:E6:1F:
  • CF:52:2E:80:6E:9D:CF:5F