⚠️ Your size goes first. 1+1 for a little longer.

Preview text: The most popular sizes are running low. No size, no 1+1.

Mystershirt

Thursday, Oct 15, 2026 at 8:58 AM EasternKlaviyo

Mystershirt⚠️ Your size goes first. 1+1 for a little longer.

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⚠️ Your size goes first. 1+1 for a little longer. - email from Mystershirt

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Subject: ⚠️ Your size goes first. 1+1 for a little longer.
Preview text: The most popular sizes are running low. No size, no 1+1.
From: hello@mystershirt.com
Brand: Mystershirt
ESP: Klaviyo
Sent: Thu Oct 15, 2026, 8:58 AM ET
Sent to: Belgium (mystershirt.be), mystershirt.com, Poland (mystershirt.pl)
Size: 29 KB
Images: 6
Links: 6, 1 of them buttons
Subject length: 48 characters

Against Mystershirt's usual

Sent in the 8 AM hour, which holds 3% of its emails; 15% arrive in the 4 AM hour. The subject is 48 characters; its average is 43.

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What the brand's servers put on this email. Our receiving servers, the address we subscribed with and unsubscribe links are left out.

From: Mystershirt <[email protected]>
Subject: ⚠️ Your size goes first. 1+1 for a little longer.
Date: Thu, 15 Oct 2026 12:58:05 +0000
Message-ID domain: klaviyomail.com
Return-Path domain: k3.hello.mystershirt.com
DKIM signature: d=shared.klaviyomail.com s=def1; d=hello.mystershirt.com s=mtd1
List-Unsubscribe: Present, one-click

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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-Message, X-Kmail-Ops, X-Report-Abuse

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Sent just before and after

	Oct 21, 2026 11:15 AM	Moving Warehouse Clearance! 🚚
	Oct 16, 2026 1:45 PM	🔥 The best shirts are going out now
	Oct 16, 2026 8:35 AM	⏳ Last call: our birthday 1+1 ends tonight
	Oct 15, 2026 8:58 AM	⚠️ Your size goes first. 1+1 for a little longer. (this email)
	Oct 14, 2026 7:15 AM	⏳ Open one now. Keep one sealed for the big moment.
	Oct 13, 2026 12:43 PM	🎲 Two reveals. Double the chance of that one shirt.
	Oct 9, 2026 4:00 AM	🧺 Matchday. And your shirt's in the wash.