What is biofeedback?
Preview text: And why does it matter for your heart health routine?

Using this email in an article? Credit: Zona Health email via They Sent It, with a link to this page. Full-size image
- Subject
- What is biofeedback?
- Preview text
- And why does it matter for your heart health routine?
- From
- customerservice@
zona.com - Brand
- Zona Health
- ESP
- Klaviyo
- Sent
- Sat Oct 17, 2026, 9:02 AM ET
- Sent to
- buyzona.com, zona.com
- Size
- 91 KB
- Images
- 8
- Links
- 12, 5 of them buttons
- Subject length
- 20 characters
Against Zona Health's usual
Sent in the 9 AM hour, which holds 10% of its emails; 17% arrive in the 2 PM hour. The subject is 20 characters; its average is 39.
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
- Julie from Zona Health <[email protected]>
- Subject
- What is biofeedback?
- Date
- Sat, 17 Oct 2026 13:02:11 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-80
- Return-Path domain
- send.zona.com
- DKIM signature
- d=zona.com s=kl2
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- by recvd-…-wvp5j with SMTP
- from (unnamed) by geopod-ismtpd-80 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
Sent just before and after
| Oct 19, 2026 12:29 AM | The Zona Plus Was An Accidental Discovery | |
| Oct 18, 2026 2:54 PM | Hear About How Zona Has Helped Others Like You! | |
| Oct 17, 2026 9:03 PM | The Zona Plus Was An Accidental Discovery | |
| Oct 17, 2026 9:02 AM | What is biofeedback? (this email) | |
| Oct 17, 2026 8:40 AM | Hear About How Zona Has Helped Others Like You! | |
| Oct 17, 2026 12:28 AM | Welcome to the Zona Family! | |
| Oct 16, 2026 2:53 PM | The Zona Plus Was An Accidental Discovery |
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Same ESP and the closest weekly volume, sent on Oct 17, 2026.









