Sleep masks suck

Here’s why Manta masks don’t.

Fri, Sep 11 · 9:02am ET Surveys & Feedback

Sent with Klaviyo Sends about 3 a week All facts

Manta Sleep expresses gratitude to their supporters and provides options to update email preferences. They acknowledge customer appreciation and offer access to their products. The brand also invites engagement through their social media channels.

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 46 emails from Manta Sleep

The copy

27 words · under a minute to read

Manta Sleep logo

See the result

Set a goal people care about

Shop manta masks

Get customer feedback

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

o1406.shared.klaviyomail.com · 149.72.88.114

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 o1406.shared.klaviyomail.com (149.72.88.114) by [receiver] (cloudflare) id BbPdE4UmSnP8 for <[recipient]>; Fri, 11 Sep 2026 13:02:56 +0000
Received: by recvd-canary-7d8bdf8df4-j8gg4 with SMTP id recvd-canary-7d8bdf8df4-j8gg4-1-6AA3FC00-3F 2026-09-11 13:02:56.226263073 +0000 UTC m=+3866977.853274749
Received: from NTg5NTg1NQ (unknown) by geopod-ismtpd-27 (SG) with HTTP id -1gc8VuQT5-8BF1_VSlq5A Fri, 11 Sep 2026 13:02:56.155 +0000 (UTC)

Authentication

Received-SPF Authentication result: pass ([receiver]: domain of [recipient]@klaviyo.mantasleep.com designates 149.72.88.114 as permitted sender) receiver=[receiver]; client-ip=149.72.88.114; envelope-from="[recipient]@klaviyo.mantasleep.com"; helo=o1406.shared.klaviyomail.com;
Authentication-Results Authentication result: [receiver]; dkim=pass header.d=mantasleep.com header.s=kl2 header.b=KPL9FBJ2; dmarc=pass header.from=mantasleep.com policy.dmarc=none; spf=none ([receiver]: no SPF records found for [email protected]) smtp.helo=o1406.shared.klaviyomail.com; spf=pass ([receiver]: domain of [recipient]@klaviyo.mantasleep.com designates 149.72.88.114 as permitted sender) smtp.mailfrom=[recipient]@klaviyo.mantasleep.com; arc=none smtp.remote-ip=149.72.88.114

Platform

X-Kmail-Account: KYgPD8
X-Kmail-Message: 01M1JT36VWBMA3814GG7CAMY2P
X-Kmail-Ops: 01KXF2R3JSH9777JVSMDCCMC6Q
X-SG-EID: u001.xeEgffpsmHA1gha/vIlCfnFDCPUYhzR8uskr3qDb2pX8KCnJWbdA3jE6/xdLuuEdy2P4DBV8umCY0uyExloeEQp3aj8+f+uOEQ7an24fwf5jAdVKbSL0tkbYdT0yAC/VXpnf2ddNVjnY2iJVICs6yIFTkDwasEBr6Xa22I5MP0kHOvoOjhYjj7qN6sxtQiSF6vOJVPbhaRQ8m5pOPG3Ypi9xFjTqHyw8Li9IRH4siYfH/1+rn+ay6gXA1oa3ukNsUFNbNOU1n0veyQR5wSmCXw==
X-SG-ID: u001.SdBcvi+Evd/bQef8eZF3BiU3Zi1S53GtqGa3TWBmqe75yn5aYrkvkfG+ZGKrHRvq5L1Pw6pZ2fI18+Jq/t9AxY8t7YCTCy7IOdSMatKI1SDTgCpbep8m09siQKtADlG8rYv0vhmfvDnCVvmE+2XxkxNxsMQ7UbGOr8FI67VwiIBdcyrkVxhLldO94GRITe68ORTT8Y1DNxILsBujkY+TNl1HNnv95WojrAtMnDxDPM/t7LxO8HMUf4iHeiOKlBjS4pw0j9CoylnU6DgVQIQbRhwxud1Q5Vf+OzKlkwkAoOLJGV4hGUnmnwnLdnpJ5GRiZoP1bjdZ5omKO2yXwRm5quyJDqfcoh+YJmu8PDKhoCcj6nXMBnJok2sWovMNRooC
X-Entity-ID: u001.hfPXRH9Vf9JkJDdd7ZPpgQ==

Unsubscribe and feedback

List-Unsubscribe: <https://manage.kmail-lists.com/…>
List-Unsubscribe-Post: List-Unsubscribe=One-Click
X-Report-Abuse: Please report any spam or abuse to: [email protected]

Message

Content-Type: multipart/alternative; boundary=38df00c5a4e00cd92fe977b8af075c72e5e736432d2ff4bdaca3b8828823
Date: Fri, 11 Sep 2026 13:02:56 +0000 (UTC)
From: Manta Sleep <[email protected]>
Mime-Version: 1.0
Message-ID: <-1gc8VuQT5-8BF1_VSlq5A@geopod-ismtpd-27>
Subject: Sleep masks suck

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