Up at 3 AM? So were our ancestors.
It’s not just you, it’s biology.
Manta Sleep <[email protected]>
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Manta Sleep promotes understanding and protecting rest, highlighting the concept of biphasic sleep. They offer tips to help overcome early-morning wake-ups and fall back asleep. Manta Sleep expresses appreciation for their supporters.
What the raw message shows
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Klaviyo See it in the headers
Across Manta Sleep's email
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- About 3 a week
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Not enforced
Failures are monitored but still delivered.
The copy
34 words · under a minute to read
Manta Sleep logo
The right habits can help you beat early-morning wake-ups and fall back asleep
Get more tips
Protect your rest
Understand your sleep
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What the headers say
Read from the message's own headers, as it arrived.
- Came from
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o1329.shared.klaviyomail.com
· 167.89.84.19
Klaviyo's sending servers
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- Pass for klaviyo.mantasleep.com
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- Pass signed by mantasleep.com
- DMARC
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Pass for mantasleep.com
Policy: none, so failures would still be delivered
- Unsubscribe
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One-click
Meets the Gmail and Yahoo rule for bulk senders.
- Complaints
- No feedback-loop header
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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 o1329.shared.klaviyomail.com (167.89.84.19) by [receiver] (cloudflare) id HC774XQLVo6k for <[recipient]>; Fri, 17 Jul 2026 15:02:36 +0000
- Received
- by recvd-69bb5f489f-b276v with SMTP id recvd-69bb5f489f-b276v-1-6A5A440C-27 2026-07-17 15:02:36.307474249 +0000 UTC m=+663635.496643909
- Received
- from NTg5NTg1NQ (unknown) by geopod-ismtpd-44 (SG) with HTTP id 8q94KoF_QriKArt2wmJWJQ Fri, 17 Jul 2026 15:02:36.250 +0000 (UTC)
Authentication
- Received-SPF Authentication result
- pass ([receiver]: domain of [recipient]@klaviyo.mantasleep.com designates 167.89.84.19 as permitted sender) receiver=[receiver]; client-ip=167.89.84.19; envelope-from="[recipient]@klaviyo.mantasleep.com"; helo=o1329.shared.klaviyomail.com;
- Authentication-Results Authentication result
- [receiver]; dkim=pass header.d=mantasleep.com header.s=kl2 header.b=CZekvzCA; dmarc=pass header.from=mantasleep.com policy.dmarc=none; spf=none ([receiver]: no SPF records found for [email protected]) smtp.helo=o1329.shared.klaviyomail.com; spf=pass ([receiver]: domain of [recipient]@klaviyo.mantasleep.com designates 167.89.84.19 as permitted sender) smtp.mailfrom=[recipient]@klaviyo.mantasleep.com; arc=none smtp.remote-ip=167.89.84.19
Platform
- X-Kmail-Account
- KYgPD8
- X-Kmail-Message
- 01KXCVPCMMGAD88VA769W46GJA
- X-Kmail-Ops
- 01KXF2R3JSH9777JVSMDCCMC6Q
- X-SG-EID
- u001.xeEgffpsmHA1gha/vIlCfnFDCPUYhzR8uskr3qDb2pX8KCnJWbdA3jE6/xdLuuEdy2P4DBV8umCY0uyExloeESrnvxWUw/a5euqy2hq4zC9Kgj2/Ny8azzVLFjIUd+kzKIJ6v6hjXdnXDXrDpesyFojdowalal7rSKlKx3GWqiNi2j8wr2guLEjSGe5y316KVYql+FtUEdqMMKdraKvkCwdM23dX7gMurc3yJ12Vsjy7XU5/r28aQH7lmQjaO5ld
- X-SG-ID
- u001.SdBcvi+Evd/bQef8eZF3BiU3Zi1S53GtqGa3TWBmqe75yn5aYrkvkfG+ZGKrHRvq5L1Pw6pZ2fI18+Jq/t9AxY8t7YCTCy7IOdSMatKI1SDTgCpbep8m09siQKtADlG8Xdfgk7EhFv4N5vcSR+QXW3RIQmpqjvJouSJncgdvTL90tohoX90amUfz6LqcCfxksBAmoL81JNsNle80S4JeHNeHQS9by1rqa93fsmmwBwmBrfvaBbgin0ohCsNkcEa3nZ6Q1KeJYMbf/6sJKCEQMaFO3enxBBJED4hGDtBLRSGe9uf8g0eyJAvrqg7zWFZhGucMkYAi4NdFgHfDrT7nWVGljy5l2rzpYLlkHuwJpJ1x3LAxKHzy0fpbYHxXc6ow
- X-Entity-ID
- u001.hfPXRH9Vf9JkJDdd7ZPpgQ==
Unsubscribe and feedback
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- <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=6bb7630a42c5805aaf0bab46c8f2e3240d615aa8898f05119a874589b89d
- Date
- Fri, 17 Jul 2026 15:02:36 +0000 (UTC)
- From
- Manta Sleep <[email protected]>
- Mime-Version
- 1.0
- Message-ID
- <8q94KoF_QriKArt2wmJWJQ@geopod-ismtpd-44>
- Subject
- Up at 3 AM? So were our ancestors.
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