Hormones shift. So does your sleep.

Preview text: Hormones shift. So does your sleep. 96 See what's different at each life stage — and what…

Sleep DoctorWednesday, Sep 23, 2026 at 9:30 AM EasternKlaviyo
Sleep DoctorHormones shift. So does your sleep.
Subject
Hormones shift. So does your sleep.
Preview text
Hormones shift. So does your sleep. 96 See what's different at each life stage — and what…
From
info@send.sleepdoctor.com
Sent
Wed Sep 23, 2026, 9:30 AM ET
Sent to
americansleepassociation.net, singularsleep.com, sleepassociation.com, sleepassociation.info, sleepdoctor.com, sleepdoctorpm.com, thepowerofwhenquiz.com, thesleepdoctor.com
Size
71 KB
Images
17
Links
33, 4 of them buttons
Subject length
35 characters

Against Sleep Doctor's usual

Sent in its busiest hour, 9 AM, which holds 23% of its emails. The subject is 35 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]>
Reply-To
Sleep Doctor <[email protected]>
Subject
Hormones shift. So does your sleep.
Date
Wed, 23 Sep 2026 13:30:03 +0000
Message-ID domain
cio151267.send.sleepdoctor.com
Return-Path domain
cio151267.send.sleepdoctor.com
DKIM signature
d=cio151267.send.sleepdoctor.com s=cio
List-Unsubscribe
Present, one-click
Mailer
Customer.io (…_; +https://whatis.customeriomail.com)

Servers it passed through, newest first

  1. by … with HTTP

Other sending headers (names only): X-Mailgun-Sid, X-Mailgun-Sending-Ip, X-Mailgun-Dkim, X-Mailgun-Native-Send, X-Mailgun-Track-Clicks, X-Mailgun-Track-Opens, X-Report-Abuse-To, X-Mailgun-Variables

Report this email

Sent just before and after

Sep 28, 2026 9:30 AM8 signs it might be sleep apnea
Sep 27, 2026 9:00 AMWhat I wish you knew about insurance coverage
Sep 24, 2026 9:30 AMTwo sleepers, one perfect mattress (2026 expert picks)
Sep 23, 2026 9:30 AMHormones shift. So does your sleep. (this email)
Sep 21, 2026 9:30 AMHeart, brain, energy — sleep apnea's toll
Sep 20, 2026 9:00 AMTired and sleepy are not the same
Sep 17, 2026 9:30 AMGLP-1 drugs and sleep apnea: what to know

More from Sleep Doctor

All Sleep Doctor emails

Sent the same day by similar brands

Same ESP and the closest weekly volume, sent on Sep 23, 2026.

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. You'll get a confirmation email first, and you can unsubscribe anytime.