indexo.dev

heldermann.de

.de crawl

First seen 2026-04-23 · Last seen 2026-05-17 · ok HTTP/1.1 200 17112 ms crawled 2026-05-17

DE · 5.9.212.206 · AS24940 Hetzner Online GmbH

Reputation 87/100 weak security headers no dmarc policy

sector other type homepage

HTML metadata

Title
Heldermann Verlag
Description
Heldermann Verlag is a publishing company for scientific mathematical literature, in particular journals. Mathematics Publishing company Journal Zeitschrift Algebra Geometry

Technology

Server
Apache

Contact

Email

Registration

Updated
2014-02-24
Name servers
  • ns1.dwns.de.
  • ns2.dwns.de.

DNS records live

NS
  • ns1.dwns.de
  • ns2.dwns.de
MX
  • 10 post.dweb.de

Email authentication weak

SPF
v=spf1 a mx ip4:213.133.111.70 ip4:195.201.55.7 ip4:195.201.8.41 ip4:195.201.8.3 ip4:195.201.8.4 ip4:195.201.8.8 ip6:2a01:4f8:13b:100a::0/112 -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-10 to 2026-07-09
Expires in 51 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.heldermann.de/

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

Linked from (2)