Do you even need mouthwash?
Before you rinse, read this
Nathan & Sons <[email protected]>
Nathan & Sons promotes their Pearl Serum as a better alternative to conventional mouthwashes. The product contains natural botanical oils to fight bad bacteria and freshen breath without alcohol or harsh ingredients. It is positioned as a gentle and effective solution for oral health.
What the raw message shows
From the headers
- Sent with
-
Klaviyo See it in the headers
Across Nathan & Sons's email
- Sends
- About 3 a week
- DMARC
-
Enforced, quarantine
Mail failing authentication goes to spam.
The copy
236 words · about 1 min to read · 2 buttons
The answer is...
Many conventional mouthwashes rely on high concentrations of alcohol to leave your mouth feeling "clean."
🔥 You're told to swish through the burn.
😢 You set a timer and try not to tear up.
But that burning sensation?
It’s not a sign that it's working.
Alcohol and other ingredients can irritate sensitive mouth tissue. And many conventional antiseptic rinses don’t discriminate between the bacteriayou want and the bacteria you don’t.
The problem with that?
Your mouth has good bacteria, too. 🦠
To make it worse, alcohol-based rinses can also contribute to dry mouth. That matters because a healthy oral microbiome relies on healthy saliva production.
So...back to the question, Friend:
Is all mouthwash bad?
We don't think so.
Button TRY A BETTER ALTERNATIVE
🥊 It can help fight only bad bacteria.
🧘 It can even calm irritation (instead of causing it).
🦷 And fresh breath is nice.
The difference between nuking your entire mouth and rinsing with something that supports your oral health comes down to the ingredients.
That's why we made Pearl Serum.
It contains natural botanical oils to help fight bad bacteria and leave your mouth feeling truly clean.
No alcohol involved.
Just a concentrated blend of ingredients studied for their oral health benefits and designed to gently freshen your breath.
Button RINSE WITH PEARL SERUM
No Synthetic Rubbers
SHOP ORAL CARE
SUBSCRIBE AND SAVE 20%
AVOID SCAMS AND KNOCKOFFS
Nathan & Sons
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
-
o1400.shared.klaviyomail.com
· 149.72.226.45
Klaviyo's sending servers
- SPF
- Pass for k1.send.nathanandsons.com
- DKIM
-
- Pass signed by send.nathanandsons.com
- DMARC
-
Pass for nathanandsons.com
Policy: quarantine
- Unsubscribe
-
One-click
Meets the Gmail and Yahoo rule for bulk senders.
- Complaints
- No feedback-loop header
Show all 20 headers Hide the 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 o1400.shared.klaviyomail.com (149.72.226.45) by [receiver] (cloudflare) id ZDUZXO4WUTS0 for <[recipient]>; Mon, 05 Oct 2026 19:05:50 +0000
- Received
- by recvd-6566976767-wf6sx with SMTP id recvd-6566976767-wf6sx-1-6AC3F50E-6E 2026-10-05 19:05:50.373908382 +0000 UTC m=+525913.663079749
- Received
- from NDY0Mzg3ODk (unknown) by geopod-ismtpd-29 (SG) with HTTP id 3wtQEZltTTWV37BtDS-Ezg Mon, 05 Oct 2026 19:05:50.354 +0000 (UTC)
Authentication
- Received-SPF Authentication result
- pass ([receiver]: domain of [recipient]@k1.send.nathanandsons.com designates 149.72.226.45 as permitted sender) receiver=[receiver]; client-ip=149.72.226.45; envelope-from="[recipient]@k1.send.nathanandsons.com"; helo=o1400.shared.klaviyomail.com;
- Authentication-Results Authentication result
- [receiver]; dkim=pass header.d=send.nathanandsons.com header.s=s1 header.b=X7TeMp+5; dmarc=pass header.from=nathanandsons.com policy.dmarc=quarantine; spf=none ([receiver]: no SPF records found for [email protected]) smtp.helo=o1400.shared.klaviyomail.com; spf=pass ([receiver]: domain of [recipient]@k1.send.nathanandsons.com designates 149.72.226.45 as permitted sender) smtp.mailfrom=[recipient]@k1.send.nathanandsons.com; arc=none smtp.remote-ip=149.72.226.45
Platform
- X-Kmail-Account
- UTBCj8
- X-Kmail-Message
- 01M46PZDYP2FC26Y5WY85W8XVN
- X-Kmail-Ops
- 01KWXC7GA9B3WZNW77K5ZS8765
- X-SG-EID
- u001.5A6G4pd7VHH3CYZ0qS3Ub3GpDK3pk5FbRJnvFpKdnml/niasmLN1J5YbpSSlwBUElRzxpdfljxAzvULDW9vt57ANj4moewrewjVfslxJAOawdg6dVYU7yAYUTvSwr+f/dU4RDA1YaEsl74OCCL29sGtN/uQXvLJKV/TaF2vC7royXwpu42tHcvJxsWm4H6+61TF3nQR9edxKmoBgdmTWBQ0ZsRHbkUyzBY/3mC191eNs+raCnOe4REdDUz+eiQ+WA1phm7zynSWRPXJhzDIfug==
- X-SG-ID
- u001.SdBcvi+Evd/bQef8eZF3BiU3Zi1S53GtqGa3TWBmqe75yn5aYrkvkfG+ZGKrHRvqsbkvOyt30Pr9gYiLQ9GJnHEAQ8lWVnrqDiGd2uVd0t6AG7FX9tuidjpDWqNXlQFfpsWWKZoet9lE7LQRY37Iz3DUW6wjpVxr+Db5GZ3Yn38VmaYyN88/y/fW3OPH7Pa9dMrb4093bFIzpY+pUr/wuYXBFQdHDW+nY9Af99hWGaeFV8Rgg0U84ycgZew3dz0id17ibtM7rOMwCJQS0k5A5znBEReoMty3bDdYFOlpzks00yyq96dwWFUWK/hN69Dvgu5LExBBEyavvNKPCUPJLQWGaWz6it9bVyywRqnQB5qW8+YSwlo15Q8faJEZXVcW75B50AG7rlJk+0sdOcBv2A==
- X-Entity-ID
- u001.cRT1WUEQ2gTC52VvLnShoQ==
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=27ec9f17a65bd582fa85d207a4386be617ee9b59e88e87593958980d01c6
- Date
- Mon, 05 Oct 2026 19:05:50 +0000 (UTC)
- From
- Nathan & Sons <[email protected]>
- Mime-Version
- 1.0
- Message-ID
- <3wtQEZltTTWV37BtDS-Ezg@geopod-ismtpd-29>
- Subject
- Do you even need mouthwash?
More from Nathan & Sons
All 32 emailsArchived for reference and commentary. Nathan & Sons, its logos and content are the property of their respective owners; Inbox Archive claims no affiliation and has disabled all links. If you own this content and would like it removed, get in touch.