The 5-second test that predicts how long you'll live

Preview text: Doctors use this in clinical studies. You can do it at your kitchen counter.

Dr. Mark StenglerTuesday, Oct 27, 2026 at 7:01 AM EasternKlaviyo
Dr. Mark StenglerThe 5-second test that predicts how long you'll live
Subject
The 5-second test that predicts how long you'll live
Preview text
Doctors use this in clinical studies. You can do it at your kitchen counter.
From
drstengler@markstengler.com
Sent
Tue Oct 27, 2026, 7:01 AM ET
Sent to
americasnaturaldoctor.com, markstengler.com
Size
44 KB
Images
5
Links
6, 4 of them buttons
Subject length
52 characters

Against Dr. Mark Stengler's usual

Sent in its busiest hour, 7 AM, which holds 93% of its emails. The subject is 52 characters; its average is 58.

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
Dr. Mark Stengler <[email protected]>
Subject
The 5-second test that predicts how long you'll live
Date
Tue, 27 Oct 2026 11:01:12 +0000
Message-ID domain
klaviyomail.com
Return-Path domain
k3.email.markstengler.com
DKIM signature
d=shared.klaviyomail.com s=def1; d=email.markstengler.com s=mtd1
List-Unsubscribe
Present, one-click

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-Message, X-Kmail-Ops, X-Report-Abuse

Report this email

Sent just before and after

More from Dr. Mark Stengler

All Dr. Mark Stengler emails

Sent the same day by similar brands

Same ESP and the closest weekly volume, sent on Oct 27, 2026.

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. You'll get a confirmation email first, and you can unsubscribe anytime.