buttondown.email

Observed Jul 18, 2026, 12:02 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

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

172.67.72.85104.26.14.224104.26.15.2242606:4700:20::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

172.67.72.85
104.26.14.224
104.26.15.224

AAAA 3

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

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: 7f418cd6-32be-4fe2-8512-0e968364c2f9
Output Hash: 7b802859abeb2d89130ba7670e5c281fcf46f1984d0eb595263613020e4d4800
Signature: ed25519:b3db0dfa51061f472c55eefaa90489114ea1f711c8d82a42bdc2aac2bfca01697d811007778d78cdc2b0d824239ab2f8255273b080b89f81ef14d4402d8cbf0c
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

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