A free flask, on me
Preview text: Wanted to make this an easy yes

Using this email in an article? Credit: Endorphin email via They Sent It, with a link to this page. Full-size image
- Subject
- A free flask, on me
- Preview text
- Wanted to make this an easy yes
- From
- hunter@
endorphinbelt.com - Brand
- Endorphin
- ESP
- Klaviyo
- Sent
- Thu Oct 15, 2026, 6:13 AM ET
- Size
- 36 KB
- Images
- 5
- Links
- 6, 5 of them buttons
- Subject length
- 19 characters
Against Endorphin's usual
Sent in its busiest hour, 6 AM, which holds 26% of its emails. The subject is 19 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
- A free flask, on me
- Date
- Thu, 15 Oct 2026 10:13:55 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-27
- Return-Path domain
- k1.send.endorphinbelt.com
- DKIM signature
- d=send.endorphinbelt.com s=s1
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- by recvd-…-88dhp with SMTP
- from (unnamed) by geopod-ismtpd-27 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 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 | |
| Oct 15, 2026 6:13 AM | A free flask, on me (this email) | |
| Oct 14, 2026 6:12 AM | Your 10% is waiting | |
| Oct 13, 2026 6:11 AM | 💪 Claim Your Exclusive Discount! | |
| Oct 11, 2026 9:06 AM | Rose Reign is live. Make it part of your next run. |
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Oct 25, 2026 6:23 AM
Oct 25, 2026 4:03 AM
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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 15, 2026.










