They Sent It

90% of babies are missing this

and here's why it's a big problem

Persephone BiosciencesFriday, Aug 28, 2026 at 11:00 AM EasternKlaviyo
Persephone Biosciences90% of babies are missing this
Subject
90% of babies are missing this
Preview text
and here's why it's a big problem
From
hello@persephone.bio
Sent
Fri Aug 28, 2026, 11:00 AM ET
Sent to
persephone.bio
Size
44 KB
Images
8
Links
12, 4 of them buttons
Subject length
30 characters

Against Persephone Biosciences's usual

Sent in its busiest hour, 11 AM, which holds 20% of its emails. The subject is 30 characters; its average is 32.

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From
Persephone Biosciences <[email protected]>
Subject
90% of babies are missing this
Date
Fri, 28 Aug 2026 15:00:36 +0000
Message-ID domain
klaviyomail.com
Return-Path domain
k3.hello.persephone.bio
DKIM signature
d=shared.klaviyomail.com s=def1; d=hello.persephone.bio s=mtd1
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Servers it passed through, newest first

  1. from (unnamed) by kmta-mta-blue-….servers.clovesoftware.com with SMTP

Other sending headers (names only): X-Mailer-Info-Extra2, X-Mailer-Info, X-Mailer-Info-Extra, X-Kmail-Account, X-Kmail-Flow, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse

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Sent just before and after

Aug 31, 2026 7:50 PM90% of babies are missing this
Aug 31, 2026 1:46 PMHere’s 30% off to get started
Aug 30, 2026 11:08 AMYour child is in a critical window
Aug 28, 2026 11:00 AM90% of babies are missing this (this email)
Aug 26, 2026 10:59 AM👋 I'm Stephanie
Aug 25, 2026 10:58 AMWe studied a lot of 💩
Aug 24, 2026 10:57 AMWe test like lives depend on it

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