donautreuhand.de

.de crawl

First seen 2026-04-25 · Last seen 2026-05-19 · ok HTTP/1.1 200 3040 ms crawled 2026-05-19

DE · 212.227.187.244 · AS8560 IONOS SE

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: Immobilien verkaufen, vermieten & verwalten in Passau | Donau Treuhand
Description: DONAU TREUHAND GmbH & Co. KG gehört seit 1975 zu den größten Verwaltungsfirmen in ganz Niederbayern. ✔ VERMIETUNG ✔ VERKAUF ✔ VERWALTUNG → Jetzt beraten lassen!
Language: de

Technology

Server: nginx

Analytics

Google Tag Manager

Cookie consent

Usercentrics

Third-party hosts loaded (2)

app.usercentrics.eu×1
www.googletagmanager.com×1

Social

Contact

Email

service@donautreuhand.de

Phone

+49851956470

Registration

Updated

2014-02-25

Name servers

ns1.ostermaier.net.
ns2.ostermaier.net.
ns3.ostermaier.net.
ns4.ostermaier.net.

DNS records live

NS

ns1.ostermaier.net
ns2.ostermaier.net
ns3.ostermaier.net
ns4.ostermaier.net

MX

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

Verified for

Apple
Google

Email authentication weak

SPF: v=spf1 ip4:62.138.185.30 ip4:92.51.173.144 ip4:92.51.173.145 ip6:2001:1520:1:200::51e include:spf.protection.outlook.com include:spf.hornetsecurity.com include:spf-de.emailsignatures365.com -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-04-04 to 2026-07-03

Expires in 44 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.donautreuhand.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, strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=31536000