What really matters in the first 1,000 days

Preview text: Dr Federica Amati separates the evidence from the anxiety.

The Proof with Simon HillTuesday, Sep 22, 2026 at 8:01 PM EasternKlaviyo
The Proof with Simon HillWhat really matters in the first 1,000 days
Subject
What really matters in the first 1,000 days
Preview text
Dr Federica Amati separates the evidence from the anxiety.
From
hello@theproof.com
Sent
Tue Sep 22, 2026, 8:01 PM ET
Size
95 KB
Images
21
Links
43, 9 of them buttons
Subject length
43 characters

Against The Proof with Simon Hill's usual

Sent in the 8 PM hour, which holds 14% of its emails; 25% arrive in the 7 PM hour. The subject is 43 characters; its average is 40.

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
The Proof with Simon Hill <[email protected]>
Subject
What really matters in the first 1,000 days
Date
Wed, 23 Sep 2026 00:01:47 +0000 (UTC)
Message-ID domain
geopod-ismtpd-20
Return-Path domain
send.theproof.com
DKIM signature
d=theproof.com s=kl2
List-Unsubscribe
Present, one-click

Servers it passed through, newest first

  1. by recvd-…-nzxpw with SMTP
  2. from (unnamed) by geopod-ismtpd-20 with HTTP

Other sending headers (names only): X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID

Report this email

Sent just before and after

Oct 2, 2026 1:01 AMAgeing is not fixed: what actually slows it?
Sep 29, 2026 8:00 PMDo you actually need surgery?
Sep 24, 2026 10:01 PMIntroducing BDR: Bloating & Digestive Relief
Sep 22, 2026 8:01 PMWhat really matters in the first 1,000 days (this email)
Sep 16, 2026 10:00 PMWhat we’re getting wrong about protein
Sep 14, 2026 8:01 PMThe Liver Disease 30% of Us Have and Never Feel
Sep 12, 2026 1:00 AMWe need to talk about colorectal cancer

More from The Proof with Simon Hill

All The Proof with Simon Hill emails

Get the Black Friday insights

We're collecting every Black Friday email from more than 50,000 brands as it lands. Get what we find: who starts first, the biggest discounts, and the subject lines that stand out.

Free. Unsubscribe anytime.