Your child is in a critical window
Preview text: The first 1,000 days matter the most

Use this example
- Subject
- Your child is in a critical window
- Preview text
- The first 1,000 days matter the most
- From
- hello@
persephone.bio - ESP
- Klaviyo
- Sent
- Thu Sep 17, 2026, 11:41 AM ET
- Sent to
- dumponcancer.com
- Size
- 46 KB
- Images
- 4
- Links
- 11, 6 of them buttons
- Subject length
- 34 characters
Against Persephone Biosciences's usual
Sent in its busiest hour, 11 AM, which holds 20% of its emails. The subject is 34 characters; its average is 32.
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
- Persephone Biosciences <[email protected]>
- Subject
- Your child is in a critical window
- Date
- Thu, 17 Sep 2026 15:41:49 +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
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- from (unnamed) by kmta-mta-green-….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
Sent just before and after
| Sep 21, 2026 12:52 PM | Is your baby missing this key to lifelong health? | |
| Sep 19, 2026 11:42 AM | Most probiotic companies start with the strains | |
| Sep 17, 2026 3:09 PM | 90% of babies are missing this | |
| Sep 17, 2026 11:41 AM | Your child is in a critical window (this email) | |
| Sep 15, 2026 11:41 AM | 90% of babies are missing this | |
| Sep 13, 2026 11:39 AM | 👋 I'm Stephanie | |
| Sep 12, 2026 11:37 AM | We studied a lot of 💩 |
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Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Sep 17, 2026.








