rudolf-mueller.de

.de crawl

First seen 2026-04-14 · Last seen 2026-05-19 · ok HTTP/1.1 200 2252 ms crawled 2026-05-08

DE · 212.161.62.20 · AS8220 COLT Technology Services Group Limited

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: RM Rudolf Müller | Startseite
Description: Willkommen bei der Rudolf Müller Mediengruppe! Bauen und Handelsmarketing sind unser Spezielgebiet. Wir bieten berufsnahe und praxisorientierte Fachinformationen/Fachmedien.
Language: de
Canonical: https://www.rudolf-mueller.de/

Open Graph

url: https://www.rudolf-mueller.de/
title: RM Rudolf Müller | Startseite
description: Willkommen bei der Rudolf Müller Mediengruppe! Bauen und Handelsmarketing sind unser Spezielgebiet. Wir bieten berufsnahe und praxisorientierte Fachinformationen/Fachmedien.

Technology

Server: shttpd

Cookie consent

Usercentrics

Third-party hosts loaded (3)

app.usercentrics.eu×3
privacy-proxy.usercentrics.eu×3
api.usercentrics.eu×1

Social

Contact

Phone

+4961239238258

Registration

Updated

2014-06-19

Name servers

dns11.netcologne.de.
dns12.netcologne.de.
dns13.netcologne.de.
dns14.netcologne.de.

DNS records live

NS

dns11.netcologne.de
dns12.netcologne.de
dns13.netcologne.de
dns14.netcologne.de

MX

10 mx-in01.eu.retarus.com
10 mx-in02.eu.retarus.com

TXT

Show 4 TXT records

apple-domain-verification=BWfjP7CyTlsBX9O3
P3EFusXnqzSGOi4a4D7e-suBYkli2HcH6qi1JGu7yAQ
0mS6MeRcCPZvlwGabB112yaVoOVyCQomMxvkgFuR8hzZsEts9BCVEYrVRPKzlUelS7fSV+HS8l35QuQkwbbYQg==
MS=ms97034278

Email authentication partial

SPF

v=spf1 include:_spf.retarus.com ~all

softfail (~all)

DMARC

v=DMARC1; p=none; pct=100; rua=mailto:dmarc@rudolf-mueller.de; ruf=mailto:dmarc@rudolf-mueller.de

policy: none (monitoring only)

DKIM

s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxCCuz2zGbc84sHR2xyvR3sBK7jzr5SirPmG3VCDp6R75o9Ps/qyixNmIx0Ke1wuZR1q0p7OsjqHWCGwcsm…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCcobTBuG4vD9fNr8qHp6M0MKcaN3C3hSZreAOD7K/T5mJ22szI/MWRhU4xlvjGPKvq/yXyQj/wuQXmJ8WWzCAa1u…

selectors probed

Certificate (current)

R13

from 2026-03-10 to 2026-06-08

Expires in 19 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.rudolf-mueller.de/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=15768000, max-age=31536000; includeSubDomains