They Sent It

The art of the mystery

Tonight your free second Mystery Box disappears.

MystershirtThursday, Aug 13, 2026 at 1:16 PM EasternKlaviyo
MystershirtThe art of the mystery
Subject
The art of the mystery
Preview text
Tonight your free second Mystery Box disappears.
From
hello@mystershirt.com
Sent
Thu Aug 13, 2026, 1:16 PM ET
Sent to
Belgium (mystershirt.be)
Size
12 KB
Images
1
Links
2, 1 of them buttons
Subject length
22 characters

Against Mystershirt's usual

Sent in the 1 PM hour, which holds 5% of its emails; 15% arrive in the 4 AM hour. The subject is 22 characters; its average is 43.

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
Arthur from Mystershirt <[email protected]>
Subject
The art of the mystery
Date
Thu, 13 Aug 2026 17:16:04 +0000 (UTC)
Message-ID domain
geopod-ismtpd-7
Return-Path domain
k1.hello.mystershirt.com
DKIM signature
d=hello.mystershirt.com s=s1
List-Unsubscribe
Present, one-click

Servers it passed through, newest first

  1. by recvd-…-pmg94 with SMTP
  2. from (unnamed) by geopod-ismtpd-7 with HTTP

Other sending headers (names only): X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID

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Sent just before and after

Aug 20, 2026 4:00 AMOne shirt is a start. Ten is a wall.
Aug 18, 2026 4:00 AMFree socks. Free short. Free shipping.
Aug 14, 2026 7:45 AMThe best 10 seconds in football aren't on the pitch
Aug 13, 2026 1:16 PMThe art of the mystery (this email)
Aug 9, 2026 5:01 AMA shop shirt costs €90. Yours costs €39.95.
Aug 6, 2026 2:15 PMThe more you open, the less you pay
Jul 28, 2026 10:15 AMYour free second box is still waiting

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