klett-gruppe.de

.de crawl

First seen 2026-04-11 · Last seen 2026-05-20 · ok HTTP/1.1 200 8169 ms crawled 2026-05-19

DE · 185.219.102.195 · AS58010 uvensys GmbH

Reputation 100/100

sector education type homepage

HTML metadata

Title

Die Klett Gruppe

Description

Die Klett Gruppe ist ein führendes Bildungsunternehmen in Europa und ist mit über 90 Tochterunternehmen in 24 Ländern vertreten.

Language

Generator

TYPO3 CMS

Canonical

https://www.klett-gruppe.de/

Translations

Open Graph

title: Klett Gruppe
description: Die Klett Gruppe ist ein führendes Bildungsunternehmen in Europa und ist mit über 90 Tochterunternehmen in 24 Ländern vertreten.

Technology

Server: Webserver

Social

Registration

Updated

2025-05-01

Name servers

a.domnic24.eu.
b.domnic24.eu.
c.domnic24.eu.
d.domnic24.eu.

DNS records live

NS

a.domnic24.eu
b.domnic24.eu
c.domnic24.eu
d.domnic24.eu

MX

10 mx01.hornetsecurity.com
20 mx02.hornetsecurity.com
30 mx03.hornetsecurity.com
40 mx04.hornetsecurity.com

Verified for

Adobe
Apple
Microsoft 365

Email authentication strong

SPF: v=spf1 mx ip4:94.186.152.98 ip4:148.251.113.148 ip4:178.77.73.232 ip4:91.207.162.20 ip4:91.207.162.23 ip4:185.219.102.195 include:network.mynewsdesk.com include:spf.de.umantis.com include:spf.protection.outlook.com include:spf.crsend.com include:spf.hornetsecurity.com -all
strict (-all)
DMARC: v=DMARC1;p=reject;sp=reject;pct=100;adkim=r;aspf=r
policy: reject (enforced) · sp=reject
DKIM: no key found at common selectors

Certificate (current)

RapidSSL TLS RSA CA G1

from 2025-12-12 to 2026-12-17

Expires in 210 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 85/100 Checked live page: https://www.klett-gruppe.de/

present

strict-transport-security
content-security-policy
x-frame-options
x-content-type-options
referrer-policy

findings

CSP allows unsafe inline scripts/styles
CSP uses wildcard sources
missing Permissions Policy

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: sameorigin
x-content-type-options: nosniff
content-security-policy: default-src 'self'; frame-ancestors 'self'; connect-src 'self' *.mpm-portal.de/ maps.googleapis.com/ ; script-src 'self' 'unsafe-inline' 'unsafe-eval' blob: *.googleapis.com/ *.google.com/ *.jquery.com/ *.mpm-portal.de/ *.gstatic.com/; worker-src 'self' data:; style-src 'self' 'unsafe-inline' fonts.googleapis.com; img-src 'self' *.gstatic.com/ *.googleapis.com/ data: ; font-src 'self' fonts.gstatic.com/; frame-src 'self' www.youtube-nocookie.com/ www.taskcards.de/;
strict-transport-security: max-age=15768000