Stay cool all night with up to 46% off bedding

Preview text: Plus, beat the heat early with the best cooling mattress deals

Sleep DoctorWednesday, May 13, 2026 at 3:30 AM EasternKlaviyo
Sleep DoctorStay cool all night with up to 46% off bedding
Subject
Stay cool all night with up to 46% off bedding
Preview text
Plus, beat the heat early with the best cooling mattress deals
From
newsletter@sleepdoctor.com
Sent
Wed May 13, 2026, 3:30 AM ET
Sent to
singularsleep.com, sleepdoctor.com
Size
92 KB
Images
14
Links
33, 16 of them buttons
Subject length
46 characters

Against Sleep Doctor's usual

Sent in the 3 AM hour, which holds 20% of its emails; 23% arrive in the 9 AM hour. The subject is 46 characters; its average is 37.

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
Sleep Doctor <[email protected]>
Subject
Stay cool all night with up to 46% off bedding
Date
Wed, 13 May 2026 07:30:11 +0000 (UTC)
Message-ID domain
geopod-ismtpd-106
Return-Path domain
email.sleepdoctor.com
DKIM signature
d=sleepdoctor.com s=kl2
List-Unsubscribe
Present, one-click

Servers it passed through, newest first

  1. from o1393.shared.klaviyomail.com [149.72.240.239] by our receiving server with ESMTPS
  2. by recvd-…-zhxgq with SMTP
  3. from (unnamed) by geopod-ismtpd-106 with HTTP

Other sending headers (names only): X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID

Report this email

Sent just before and after

May 15, 2026 11:30 AM3 Days Only: 15% Off Your Home Sleep Study
May 14, 2026 3:30 AMEverything your therapy has been missing
May 13, 2026 1:04 PMSee something you like?
May 13, 2026 3:30 AMStay cool all night with up to 46% off bedding (this email)
May 11, 2026 3:30 AMThe best (and worst) positions for sleep apnea
May 10, 2026 3:30 AMEver dream your teeth were falling out? Here’s why.
May 7, 2026 10:30 AMWhen is "poor sleep" actually a medical issue?

More from Sleep Doctor

All Sleep Doctor emails

Get the Black Friday insights

We're collecting every Black Friday email from more than 50,000 brands as it lands. Get what we find: who starts first, the biggest discounts, and the subject lines that stand out.

Free. Unsubscribe anytime.