A CAPTCHA farm hit 18.8M times

Preview text: A CAPTCHA farm hit 18.8M times 96 How 3.2 million IPs tried to outsmart a single security…

DataDomeWednesday, Jul 29, 2026 at 10:07 AM EasternHubSpot
DataDomeA CAPTCHA farm hit 18.8M times
Subject
A CAPTCHA farm hit 18.8M times
Preview text
A CAPTCHA farm hit 18.8M times 96 How 3.2 million IPs tried to outsmart a single security…
From
news@mailing.datadome.co
Sent
Wed Jul 29, 2026, 10:07 AM ET
Size
27 KB
Images
2
Links
3, 1 of them buttons
Subject length
30 characters

Against DataDome's usual

Sent in the 10 AM hour, which holds 40% of its emails; 50% arrive in the 11 AM hour. The subject is 30 characters; its average is 36.

Email headers

What the brand's servers put on this email. Our receiving servers, the address we subscribed with and unsubscribe links are left out.

From
DataDome <[email protected]>
Subject
A CAPTCHA farm hit 18.8M times
Date
Wed, 29 Jul 2026 16:07:59 +0200
Message-ID domain
bf03.hubspotemail.net
Return-Path domain
bf03.hubspotemail.net
DKIM signature
d=bf03.hubspotemail.net s=hs1; d=mailing.datadome.co s=hs2-20268571
Authentication
dkim=pass (bf03.hubspotemail.net), dkim=pass (mailing.datadome.co), spf=pass (bf03.hubspotemail.net), dmarc=pass (mailing.datadome.co)
List-Unsubscribe
Present, one-click
Feedback-ID sender
HubSpot

Servers it passed through, newest first

  1. from bd77gf7.bf03.hubspotemail.net [143.244.90.117] by our receiving server with ESMTPS

Other sending headers (names only): X-HS-Cid, X-Report-Abuse-To

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