posteo.de

Observed Jul 22, 2026, 00:12 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation — watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Runs onINTERNET AG Global Network

Secured byDigiCert

IPv6 · 6 subdomains · tranco_20k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat posteo.de actually stands on - every host below is a signed observation

posteo.de

A / AAAA

185.67.36.168185.67.36.1692a05:bc0:1000::168:12a05:bc0:1000::169:1

INTERNET AG Global Networkserves the site

sto.excedodns.seemea.excedodns.euns01.posteo-dns.dens02.posteo-dns.de+5 more

excedodns.se + excedodns.eu + moreanswers its DNS

mx01.posteo.demx02.posteo.demx03.posteo.demx04.posteo.de

posteo.dereceives its email

TLS

posteo.de

DigiCert Incissued its certificate

DNS Records

A 2

185.67.36.168
185.67.36.169

AAAA 2

2a05:bc0:1000::168:1
2a05:bc0:1000::169:1

MX 4

10mx01.posteo.de
10mx02.posteo.de
10mx03.posteo.de
10mx04.posteo.de

TXT 5

v=spf1 ip4:185.67.36.0/23 ip6:2a05:bc0:1000::/47 ~all
84944eaf2fa3496cc8b73383c39b0046330432b19e3400ce8c21052b09194db
e09403217652a8ddff5c9587701e02f9d12b226b6523bcf247aee481d00b4b1
v=DMARC1; p=none; sp=quarantine; adkim=s; aspf=s
v=STSv1; id=20251202110430Z

NS 9

sto.excedodns.se
emea.excedodns.eu
ns01.posteo-dns.de
ns02.posteo-dns.de
ns21.posteo-dns.ch
ns31.posteo-dns.eu
world.excedodns.org
global.excedodns.com
nordic.excedodns.net

SOA 1

ns01.posteo-dns.de hostmaster.posteo.de

SRV 2

posteo.de:443 p0
posteo.de:993 p0

CAA 6

iodef "mailto:hostmaster@posteo.de"
issue "certum.pl"
issue "d-trust.net"
issue "geotrust.com"
issuewild "d-trust.net"
issuewild "geotrust.com"

TLS Certificates (2)

Common Name	Issuer	Expires
`posteo.de`	C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2	Wed, 24 Feb 2027 23:59:59 +0000
`GeoTrust EV RSA CA G2`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2	Tue, 02 Jul 2030 12:42:57 +0000

Subdomains (6)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for posteo.de. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/posteo.de">
  <img src="https://domaindrift.io/badge/posteo.de.svg"
       width="300" height="64" alt="DomainDrift signed observations for posteo.de">
</a>

Ed25519 Receipt

Receipt ID: rcpt_298ab979aef6a819
Output Hash: bebe70206528e189849b8fc07967e5818b3e8483bdc4b690c35647e9c2f88828
Signature: ed25519:d0c6df1db015b9e20462da992bec57b740e9dec080bb52c00f582e4a9325a4d46408b4f68fcb0699a6a774d264ba4a3354ad034a1b09ce3e6baedb17cad99a04
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

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