Proven Science. Visible Results.
Preview text: Here's what makes it worth it.
Using this email in an article? Credit: Caldera + Lab email via They Sent It, with a link to this page. Full-size image
- Subject
- Proven Science. Visible Results.
- Preview text
- Here's what makes it worth it.
- From
- hello@
calderalab.com - Brand
- Caldera + Lab
- ESP
- Klaviyo
- Sent
- Wed Oct 28, 2026, 1:36 AM ET
- Size
- 69 KB
- Images
- 16
- Links
- 29, 4 of them buttons
- Subject length
- 32 characters
Against Caldera + Lab's usual
Sent in the 1 AM hour, which holds 5% of its emails; 30% arrive in the 10 AM hour. The subject is 32 characters; its average is 27.
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
- Caldera + Lab <[email protected]>
- Subject
- Proven Science. Visible Results.
- Date
- Wed, 28 Oct 2026 05:36:31 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-45
- Return-Path domain
- send.calderalab.com
- DKIM signature
- d=calderalab.com s=kl2
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- by recvd-…-45c2x with SMTP
- from (unnamed) by geopod-ismtpd-45 with HTTP
Other sending headers (names only): X-Kmail-Account, X-Kmail-Flow, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID
Sent just before and after
| Oct 30, 2026 8:55 AM | Hear From Real Users | |
| Oct 30, 2026 1:37 AM | Don't Just Take Our Word For It | |
| Oct 28, 2026 10:30 AM | Here's Your Streamlined Morning Routine | |
| Oct 28, 2026 1:36 AM | Proven Science. Visible Results. (this email) | |
| Oct 27, 2026 1:35 AM | Still Thinking it Over? | |
| Oct 25, 2026 11:15 AM | A Guaranteed Touchdown | |
| Oct 25, 2026 8:54 AM | Science-Backed Specificity |
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Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Oct 28, 2026.
