buttondown.email

Observed Jul 21, 2026, 19:09 UTC (12h 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 onCloudflare

Email byGoogle Workspace

Secured byGoogle Trust Services

Also uses1PasswordGoogle Search Console

IPv6 · 1 subdomain · media

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

INFRASTRUCTURE MAPwhat buttondown.email actually stands on - every host below is a signed observation

buttondown.email

A / AAAA

104.26.15.224172.67.72.85104.26.14.2242606:4700:20::681a:fe0+2 more

Cloudflareserves the site

apollo.ns.cloudflare.comivy.ns.cloudflare.com

cloudflare.comanswers its DNS

aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comalt1.aspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

buttondown.email

Google Trust Servicesissued its certificate

DNS Records

A 3

104.26.15.224
172.67.72.85
104.26.14.224

AAAA 3

2606:4700:20::681a:fe0
2606:4700:20::ac43:4855
2606:4700:20::681a:ee0

MX 5

1aspmx.l.google.com
10alt3.aspmx.l.google.com
10alt4.aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com

TXT 8

1password-site-verification=SQFNCPTWYJFUZGBQTZBBBQT7YI
ALIAS for polar-river-hggprmzkna9p4dkhgk3jhfxw.herokudns.com
google-site-verification=Dmi0GffqXwrRbWgcif8u9EJvtBWhMMfRpvBXB13nmxg
google-site-verification=k-46SCelqDM-DYP7-riK-rNWNak9ep4M4-iabUrxr9g
v=spf1 include:mailgun.org include:_spf.google.com include:_spf.smtp-relay.buttondown.email ~all
yahoo-verification-key=+2xXdyy7PO1udmxZHJNvAMCBOwbGtTPnYHsdsU6LuUY=
yahoo-verification-key=k0v5slP3g0A6rJfJnyMCdKHj2DHYAsJfhpLc1D1qCRM=
v=DMARC1; p=none; rua=mailto:dmarc.y8rijlj3ojbbqjpggdoj@mail.suped.com,mailto:postmaster@buttondown.com; fo=1

NS 2

apollo.ns.cloudflare.com
ivy.ns.cloudflare.com

SOA 1

apollo.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (3)

Common Name	Issuer	Expires
`buttondown.email`	C=US, O=Google Trust Services, CN=WE1	Wed, 09 Sep 2026 20:04:13 +0000
`WE1`	C=US, O=Google Trust Services LLC, CN=GTS Root R4	Tue, 20 Feb 2029 14:00:00 +0000
`GTS Root R4`	C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA	Fri, 28 Jan 2028 00:00:42 +0000

Subdomains (1)

assets.buttondown.email

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 buttondown.email. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_ecaf2a4e3c5e01f2
Output Hash: 70fdf02dbffa7f1fc86f1e3d5c0ce675e9917926abb3b835c2dd60e1dc92247c
Signature: ed25519:47c6c63999ac80f68e7844fa612ec77726ba6d837eaf6174fbf9d209cd2029721744931251e0a2f638cddfa2fed3728590d5db198fadbad5f45e833264f74b02
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

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