indexo.dev

letterbox-online.de

.de crawl dns

First seen 2026-04-30 · Last seen 2026-05-20 · ok HTTP/1.1 200 1463 ms crawled 2026-05-08

DE · 78.46.107.83 · AS24940 Hetzner Online GmbH

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Letterbox Online by binary butterfly GmbH :: Welcome to Letterbox Online by binary butterfly GmbH
Language
en

Technology

Server
nginx

Registration

Updated
2020-02-26
Name servers
  • root-dns.netcup.net.
  • second-dns.netcup.net.
  • third-dns.netcup.net.

DNS records live

NS
  • root-dns.netcup.net
  • second-dns.netcup.net
  • third-dns.netcup.net
MX
  • 10 letterbox-online.de
Verified for
  • Google

Email authentication weak

SPF
v=spf1 ip4:78.46.107.83 ip6:2a01:4f8:121:4d2::2 ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-28 to 2026-07-27
Expires in 67 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://webmail.letterbox-online.de/

present
  • strict-transport-security
  • x-frame-options
findings
  • missing Content Security Policy
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
sameorigin
strict-transport-security
max-age=31536000; includeSubdomains; preload

Links to (1)

Linked from (1)