You don’t need a vest

Preview text: Not for most runs

Endorphin

Sunday, Oct 18, 2026 at 6:16 AM EasternKlaviyo

EndorphinYou don’t need a vest

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You don’t need a vest - email from Endorphin

Using this email in an article? Credit: Endorphin email via They Sent It, with a link to this page. Full-size image

Subject: You don’t need a vest
Preview text: Not for most runs
From: support@endorphinbelt.com
Brand: Endorphin
ESP: Klaviyo
Sent: Sun Oct 18, 2026, 6:16 AM ET
Size: 42 KB
Images: 15
Links: 15, 4 of them buttons
Subject length: 21 characters

Against Endorphin's usual

Sent in its busiest hour, 6 AM, which holds 25% of its emails. The subject is 21 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: You don’t need a vest
Date: Sun, 18 Oct 2026 10:16:37 +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

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Sent just before and after

	Oct 21, 2026 6:19 AM	Your phone stays dry
	Oct 20, 2026 6:18 AM	Carry water smarter
	Oct 19, 2026 6:17 AM	Belt vs belt
	Oct 18, 2026 6:16 AM	You don’t need a vest (this email)
	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