I'm the engineer who built the MACH. Here's what I fixed.
Preview text: The v3.0 was great. One thing kept me up at night.

Using this email in an article? Credit: VortexHaus email via They Sent It, with a link to this page. Full-size image
- Subject
- I'm the engineer who built the MACH. Here's what I fixed.
- Preview text
- The v3.0 was great. One thing kept me up at night.
- From
- info@
vortexhaus.com - Brand
- VortexHaus
- ESP
- Klaviyo
- Sent
- Wed Sep 30, 2026, 12:08 PM ET
- Sent to
- vortexhaus.com
- Size
- 49 KB
- Images
- 15
- Links
- 15, 1 of them buttons
- Subject length
- 57 characters
Against VortexHaus's usual
Sent in its busiest hour, 12 PM, which holds 39% of its emails. The subject is 57 characters; its average is 41.
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
- VortexHaus <[email protected]>
- Subject
- I'm the engineer who built the MACH. Here's what I fixed.
- Date
- Wed, 30 Sep 2026 16:08:36 +0000
- Message-ID domain
- klaviyomail.com
- Return-Path domain
- k3.hello.vortexhaus.com
- DKIM signature
- d=shared.klaviyomail.com s=def1; d=hello.vortexhaus.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-Message, X-Kmail-Ops, X-Report-Abuse
Sent just before and after
| Oct 4, 2026 12:01 PM | Fall Reset Sale ends tonight | |
| Oct 3, 2026 12:02 PM | Their numbers. Not ours. | |
| Oct 2, 2026 12:01 PM | The question I get most. Here's the real answer. | |
| Sep 30, 2026 12:08 PM | I'm the engineer who built the MACH. Here's what I fixed. (this email) | |
| Sep 28, 2026 12:07 PM | We asked 378 people why they hadn't bought yet. | |
| Sep 26, 2026 12:00 PM | You already own the most expensive part | |
| Sep 24, 2026 12:04 PM | You’re not sure yet. So here’s what we do. |
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