Why we made this
Preview text: It started with frustration

- Subject
- Why we made this
- Preview text
- It started with frustration
- From
- support@
endorphinbelt.com - Brand
- Endorphin
- ESP
- Klaviyo
- Sent
- Fri Oct 16, 2026, 6:14 AM ET
- Size
- 42 KB
- Images
- 15
- Links
- 15, 4 of them buttons
- Subject length
- 16 characters
Against Endorphin's usual
Sent in its busiest hour, 6 AM, which holds 26% of its emails. The subject is 16 characters; its average is 26.
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 Endorphin Belt <[email protected]>
- Subject
- Why we made this
- Date
- Fri, 16 Oct 2026 10:14:42 +0000
- Message-ID domain
- klaviyomail.com
- Return-Path domain
- k3.send.endorphinbelt.com
- DKIM signature
- d=shared.klaviyomail.com s=def1; d=send.endorphinbelt.com s=mtd1
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- 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-Flow, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse
Sent just before and after
| Oct 19, 2026 6:17 AM | Belt vs belt | |
| Oct 18, 2026 6:16 AM | You don’t need a vest | |
| Oct 17, 2026 6:15 AM | The bounce problem | |
| Oct 16, 2026 6:14 AM | Why we made this (this email) | |
| Oct 15, 2026 6:13 AM | A free flask, on me | |
| Oct 14, 2026 6:12 AM | Your 10% is waiting | |
| Oct 13, 2026 6:11 AM | 💪 Claim Your Exclusive Discount! |
More from Endorphin
All Endorphin emailsNov 1, 2026 2:00 AM
Oct 28, 2026 5:01 AM
Oct 25, 2026 6:23 AM
Oct 25, 2026 4:03 AM
Oct 24, 2026 6:22 AM
Oct 23, 2026 6:21 AM
Run with your dog. Hands free.
Oct 23, 2026 4:02 AM
Oct 22, 2026 6:20 AM
Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Oct 16, 2026.














