Heart, brain, energy — sleep apnea's toll
Preview text: Heart, brain, energy — sleep apnea's toll 96 See how one condition quietly touches three…

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- Subject
- Heart, brain, energy — sleep apnea's toll
- Preview text
- Heart, brain, energy — sleep apnea's toll 96 See how one condition quietly touches three…
- From
- info@
send.sleepdoctor.com - Brand
- Sleep Doctor
- ESP
- Klaviyo
- Sent
- Mon Sep 21, 2026, 9:30 AM ET
- Sent to
- americansleepassociation.net, singularsleep.com, sleepassociation.com, sleepassociation.info, sleepdoctor.com, sleepdoctorpm.com, thepowerofwhenquiz.com, thesleepdoctor.com
- Size
- 70 KB
- Images
- 15
- Links
- 30, 5 of them buttons
- Subject length
- 41 characters
Against Sleep Doctor's usual
Sent in its busiest hour, 9 AM, which holds 23% of its emails. The subject is 41 characters; its average is 37.
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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
- Heart, brain, energy — sleep apnea's toll
- Date
- Mon, 21 Sep 2026 13:30:05 +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
- 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
Sent just before and after
| Sep 27, 2026 9:00 AM | What I wish you knew about insurance coverage | |
| Sep 24, 2026 9:30 AM | Two sleepers, one perfect mattress (2026 expert picks) | |
| Sep 23, 2026 9:30 AM | Hormones shift. So does your sleep. | |
| Sep 21, 2026 9:30 AM | Heart, brain, energy — sleep apnea's toll (this email) | |
| Sep 20, 2026 9:00 AM | Tired and sleepy are not the same | |
| Sep 17, 2026 9:30 AM | GLP-1 drugs and sleep apnea: what to know | |
| Sep 16, 2026 9:00 AM | The headache that's actually about sleep |
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Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Sep 21, 2026.









