Built for endurance and proven under stress

Using this email in an article? Credit: First Endurance email via They Sent It, with a link to this page. Full-size image
- Subject
- Built for endurance and proven under stress
- From
- contact@
firstendurance.com - Brand
- First Endurance
- ESP
- Klaviyo
- Sent
- Wed Oct 14, 2026, 10:48 PM ET
- Sent to
- Canada (firstendurance.ca)
- Size
- 15 KB
- Images
- 1
- Links
- 3, 2 of them buttons
- Subject length
- 43 characters
Against First Endurance's usual
Sent in the 10 PM hour, which holds 11% of its emails; 12% arrive in the 4 AM hour. The subject is 43 characters; its average is 34.
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
- Jonny Bigelow | First Endurance <[email protected]>
- Subject
- Built for endurance and proven under stress
- Date
- Thu, 15 Oct 2026 02:48:55 +0000
- Message-ID domain
- klaviyomail.com
- Return-Path domain
- k3.send.firstendurance.com
- DKIM signature
- d=shared.klaviyomail.com s=def1; d=send.firstendurance.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 16, 2026 10:49 PM | Structure your nutrition like your training | |
| Oct 16, 2026 12:31 AM | Built for endurance and proven under stress | |
| Oct 15, 2026 12:29 AM | You’re In. Let’s Build Endurance. | |
| Oct 14, 2026 10:48 PM | Built for endurance and proven under stress (this email) | |
| Oct 14, 2026 2:18 PM | Mind Over Matter | |
| Oct 14, 2026 6:30 AM | Built for Endurance. | |
| Oct 13, 2026 10:47 PM | Your welcome offer is waiting |
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Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Oct 14, 2026.








