rheinwerk-verlag.de

.de crawl dns

First seen 2026-04-11 · Last seen 2026-05-20 · ok HTTP/1.1 200 2154 ms crawled 2026-05-19

DE · 103.241.48.3 · AS48314 IP-Projects GmbH & Co. KG

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: Rheinwerk – Der Verlag für IT, Design und Fotografie
Description: Rheinwerk ist der führende Verlag für IT, Design und Fotografie. Unsere Bücher helfen Einsteigern und Experten bei der Aus- und Weiterbildung.
Language: de
Canonical: https://www.rheinwerk-verlag.de/

Technology

Server: nginx

Third-party hosts loaded (1)

s3-eu-west-1.amazonaws.com×85

Social

Contact

Email

Registration

Updated

2026-02-20

Name servers

ns3.ip-projects.de.
ns4.ip-projects.de.

DNS records live

NS

ns3.ip-projects.de
ns4.ip-projects.de

MX

10 mx1.heinlein-support.de
10 mx2.heinlein-support.de
100 mail.rheinwerk-verlag.de
20 mx3.heinlein-support.de

Verified for

Google
Microsoft 365

Email authentication partial

SPF

v=spf1 ip4:103.241.48.0/26 ip4:194.8.219.19/29 include:spf.servicemail24.de -all

strict (-all)

DMARC

v=DMARC1; p=none;

policy: none (monitoring only)

DKIM

mail: v=DKIM1;h=sha256;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvXS/1KjGcKPQ8DJvA7SfJ4jLGKKeeMgOKOSToHSQOafDBWn15QM979RPCznW+HriHy1d11u…

selectors probed

Certificate (current)

R12

from 2026-04-27 to 2026-07-26

Expires in 66 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.rheinwerk-verlag.de/

present

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

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: no-referrer-when-downgrade
x-frame-options: sameorigin
x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains