rdn-online.de

.de crawl

First seen 2026-04-19 · Last seen 2026-05-12 · ok HTTP/1.1 200 3059 ms crawled 2026-05-13

DE · 217.160.0.220 · AS8560 IONOS SE

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title: RDN Agentur für Public Relations GmbH und RDN Verlags GmbH
Language: en
Canonical: https://rdn-online.de/

Open Graph

url: https://rdn-online.de/
title: RDN Agentur für Public Relations GmbH und RDN Verlags GmbH
locale: de_DE
site name: rdn - Agentur für Public Relations GmbH
description: Professionell, kreativ, multimedial: Von Websites über Pressearbeit bis hin zu Social Media und der Produktion hochwertiger neuer Medien als Verlag.

Technology

Server: Apache

Third-party hosts loaded (1)

cdn.jsdelivr.net×2

Social

Contact

Email

info@rdn-online.de

Phone

+49236149049110

Registration

Updated

2020-10-23

Name servers

ns1032.ui-dns.biz.
ns1032.ui-dns.com.
ns1032.ui-dns.de.
ns1032.ui-dns.org.

DNS records live

NS

ns1032.ui-dns.biz
ns1032.ui-dns.com
ns1032.ui-dns.de
ns1032.ui-dns.org

MX

10 rdnonline-de0i.mail.protection.outlook.com

TXT

Show 5 TXT records

brevo-code:fefb7646b46594f995a4973015a5de1d
brevo-code:b395f64166ae8f3fcd5818d9e259ae6b
google-site-verification=8wqp1xFmJhzLU5ac6FrL1v7hr_hIAP5KSzBuLIwhxjQ
sophos-domain-verification=e21277f54fb494044db1237b5c70ea0a87ff471c3f40906183101da30f8f3926
sophos-domain-verification=f360094b9f546bdd99d93c5755664acbe02169331255f11c2698b4e88def1e19

Email authentication partial

SPF

v=spf1 include:spf.protection.outlook.com include:_spf.zimpel.de -all

strict (-all)

DMARC

v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com

policy: none (monitoring only)

DKIM

mail: k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDeMVIzrCa3T14JsNY0IRv5/2V1/v2itlviLQBwXsa7shBD6TrBkswsFUToPyMRWC9tbR/5ey0nRBH0ZVxp+lsmTxid2Y2z…

selectors probed

Certificate (current)

Sectigo Public Server Authentication CA DV R36

from 2025-09-04 to 2026-09-19

Expires in 122 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://rdn-online.de/

findings

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