Don’t open this unless you want another knife
Preview text: Seriously. Just delete this one
Using this email in an article? Credit: Mystery Knives Box email via They Sent It, with a link to this page. Full-size image
Use this example
- Subject
- Don’t open this unless you want another knife
- Preview text
- Seriously. Just delete this one
- From
- hello@
mysteryknivesbox.com - Brand
- Mystery Knives Box
- ESP
- Klaviyo
- Sent
- Sat Oct 3, 2026, 5:57 PM ET
- Sent to
- knivesmysterybox.com, mysteryknife.com, mysteryknives.com
- Size
- 31 KB
- Images
- 5
- Links
- 5, 2 of them buttons
- Subject length
- 45 characters
Against Mystery Knives Box's usual
Sent in the 5 PM hour, which holds 10% of its emails; 10% arrive in the 12 AM hour. The subject is 45 characters; its average is 22.
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
- Mystery Knives <[email protected]>
- Subject
- Don’t open this unless you want another knife
- Date
- Sat, 03 Oct 2026 21:57:50 +0000
- Message-ID domain
- shopify.com
- Return-Path domain
- mailer0hi.mysteryknivesbox.com
- DKIM signature
- d=mailer0hi.mysteryknivesbox.com s=pdk2
- List-Unsubscribe
- Present, one-click
- Feedback-ID sender
- shopify
Servers it passed through, newest first
- by … with HTTP
Other sending headers (names only): X-Mailgun-Sid, X-Mailgun-Tag, X-Mailgun-Rewrite-Sender-Header, X-Mailgun-Suppressions-Bypass
Sent just before and after
| Oct 6, 2026 7:17 PM | S.P.O.O.K.Y. | |
| Oct 5, 2026 10:01 PM | YOUR MEMBER DISCOUNT | |
| Oct 4, 2026 11:17 PM | YOUR SURPRISE AWAITS!! | |
| Oct 3, 2026 5:57 PM | Don’t open this unless you want another knife (this email) | |
| Oct 1, 2026 11:49 PM | Wait… why is everything so cheap? | |
| Sep 30, 2026 3:55 PM | I Messed Up... | |
| Sep 29, 2026 1:58 PM | ⚠️ W.A.R.N.I.N.G. ⚠️ |
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Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Oct 3, 2026.
