Hustle culture is dead

Here’s your new humble brag

Mon, Aug 17 · 8:03am ET Product Showcase

Sent with Klaviyo Sends about 3 a week All facts

Manta Sleep showcases its sleep-enhancing products, including the SILK Mask and PRO Mask, as well as the SOUND+ Deep Sleep Bundle. The brand invites customers to upgrade their sleep experience. Manta Sleep expresses appreciation for customer support.

What the raw message shows

From the headers

Sent with: Klaviyo See it in the headers

Across Manta Sleep's email

Sends: About 3 a week
DMARC: Not enforced
Failures are monitored but still delivered.

Manta Sleep mantasleep.com

Whatever stops you sleeping, its days are numbered. Join 2+ million people taking control of their sleep with Manta masks and accessories.

All 37 emails from Manta Sleep

The copy

32 words · under a minute to read

Manta Sleep logo

Level up your sleep

Upgrade your sleep

Shop Manta SILK Mask

Get Manta PRO Mask

Shop SOUND+ Deep Sleep Bundle

To update your email preferences, choose your preferred option:

The words as text: what a screen reader can follow, and all there is when images don't load.

What the headers say

Read from the message's own headers, as it arrived.

Came from

o1310.shared.klaviyomail.com · 167.89.100.198

Klaviyo's sending servers

SPF

Pass for klaviyo.mantasleep.com

DKIM

Pass signed by mantasleep.com

DMARC

Pass for mantasleep.com

Policy: none, so failures would still be delivered

Unsubscribe

One-click

Meets the Gmail and Yahoo rule for bulk senders.

Complaints

No feedback-loop header

Show all 20 headers

As received, minus the delivery side: the archive's own addresses show as [recipient], its mail servers as [receiver], signatures are left out and unsubscribe links trimmed to their host.

Route

Received Identifies Klaviyo: from o1310.shared.klaviyomail.com (167.89.100.198) by [receiver] (cloudflare) id aNbottMNybv1 for <[recipient]>; Mon, 17 Aug 2026 12:04:00 +0000
Received: by recvd-5bfcddc674-w2lpc with SMTP id recvd-5bfcddc674-w2lpc-1-6A82F8AF-168 2026-08-17 12:03:59.823110664 +0000 UTC m=+1703603.339018826
Received: from NTg5NTg1NQ (unknown) by geopod-ismtpd-21 (SG) with HTTP id U2p3Jyg8TYWq2LeNyeN3CA Mon, 17 Aug 2026 12:03:59.803 +0000 (UTC)

Authentication

Received-SPF Authentication result: pass ([receiver]: domain of [recipient]@klaviyo.mantasleep.com designates 167.89.100.198 as permitted sender) receiver=[receiver]; client-ip=167.89.100.198; envelope-from="[recipient]@klaviyo.mantasleep.com"; helo=o1310.shared.klaviyomail.com;
Authentication-Results Authentication result: [receiver]; dkim=pass header.d=mantasleep.com header.s=kl2 header.b=jqBLKAkw; dmarc=pass header.from=mantasleep.com policy.dmarc=none; spf=none ([receiver]: no SPF records found for [email protected]) smtp.helo=o1310.shared.klaviyomail.com; spf=pass ([receiver]: domain of [recipient]@klaviyo.mantasleep.com designates 167.89.100.198 as permitted sender) smtp.mailfrom=[recipient]@klaviyo.mantasleep.com; arc=none smtp.remote-ip=167.89.100.198

Platform

X-Kmail-Account: KYgPD8
X-Kmail-Message: 01KZTQ2SSNQJYR4FQPY76T78PF
X-Kmail-Ops: 01KXF2R3JSH9777JVSMDCCMC6Q
X-SG-EID: u001.xeEgffpsmHA1gha/vIlCfnFDCPUYhzR8uskr3qDb2pX8KCnJWbdA3jE6/xdLuuEdy2P4DBV8umCY0uyExloeEU1hfg/xl+T+FOJWn8TradlvAhCv7eNCZtyUKcBaoNevJw9IA2MHJ/7n9nYGHG2lEZV6Ad2IMLCJRzpg1rmqV4HVsUptdI0q8cOjt7D3kmaf1vyJ1njFLI0ZsW/6/rTWBD6M+ovHW+vTjyuat71l8U8BRb+DfS3GZ4dQ+ECZltZx
X-SG-ID: u001.SdBcvi+Evd/bQef8eZF3BiU3Zi1S53GtqGa3TWBmqe75yn5aYrkvkfG+ZGKrHRvq5L1Pw6pZ2fI18+Jq/t9AxY8t7YCTCy7IOdSMatKI1SDTgCpbep8m09siQKtADlG8Xdfgk7EhFv4N5vcSR+QXWwfjwmGJtCXcy9iKsZch1raR+NVQh7ECTmUznu8PKlymcvGXggdKsbgyHNCaNjD3zQoewjZykAWcPdFzuktCWcHfmQKFCPhZTZHArYiB5vWTWocIaZjLn17v1jvSTKSB++2RrWaExY9qTdHravXT/viwRXu2MnsL6GNCEWL3VUthWLkSy0qt5kZa7cKOe1C7r2QON0j0EROtfAnbFO/ncNEy4q2tW/9aSoHPU36G5wiO
X-Entity-ID: u001.hfPXRH9Vf9JkJDdd7ZPpgQ==

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Message

Content-Type: multipart/alternative; boundary=4d5775068a57ead043bbb8a53017db220b6e58561c742be94ea918e5483c
Date: Mon, 17 Aug 2026 12:03:59 +0000 (UTC)
From: Manta Sleep <[email protected]>
Mime-Version: 1.0
Message-ID: <U2p3Jyg8TYWq2LeNyeN3CA@geopod-ismtpd-21>
Subject: Hustle culture is dead

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