Let's do the sleep math
Preview text: How much you really need at every life stage

Using this email in an article? Credit: Ozlo Sleep email via They Sent It, with a link to this page. Full-size image
- Subject
- Let's do the sleep math
- Preview text
- How much you really need at every life stage
- From
- support@
ozlosleep.co.uk - Brand
- Ozlo Sleep
- ESP
- Klaviyo
- Sent
- Sun Oct 18, 2026, 4:32 AM ET
- Sent to
- United Kingdom (ozlosleep.co.uk)
- Size
- 44 KB
- Images
- 13
- Links
- 14, 8 of them buttons
- Subject length
- 23 characters
Against Ozlo Sleep's usual
Sent in the 4 AM hour, which holds 19% of its emails; 26% arrive in the 9 AM hour. The subject is 23 characters; its average is 34.
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
- OZLO Sleep UK <[email protected]>
- Subject
- Let's do the sleep math
- Date
- Sun, 18 Oct 2026 08:32:36 +0000
- Message-ID domain
- klaviyomail.com
- Return-Path domain
- k3.send.ozlosleep.co.uk
- DKIM signature
- d=shared.klaviyomail.com s=def1; d=send.ozlosleep.co.uk s=mtd1
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- from (unnamed) by kmta-mta-blue-….servers.clovesoftware.com with SMTP
Other sending headers (names only): X-Mailer-Info-Extra2, X-Mailer-Info, X-Mailer-Info-Extra, X-Kmail-Account, X-Kmail-Flow, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse
Sent just before and after
| Oct 20, 2026 4:31 AM | Let's do the sleep math | |
| Oct 20, 2026 4:31 AM | The science of sleep cycles | |
| Oct 19, 2026 4:00 AM | 6 new sleep findings worth knowing | |
| Oct 18, 2026 4:32 AM | Let's do the sleep math (this email) | |
| Oct 18, 2026 4:32 AM | The science of sound and sleep | |
| Oct 18, 2026 4:03 AM | Everything you need to know about Sleepbuds 2 | |
| Oct 17, 2026 4:01 AM | The world's smallest earbuds designed just for sleep |
More from Ozlo Sleep
All Ozlo Sleep emailsNov 3, 2026 4:32 AM
Nov 3, 2026 4:31 AM
The art of falling asleep faster
Nov 3, 2026 4:31 AM
Your best idea might show up while you sleep
Nov 2, 2026 3:00 AM
The art of falling asleep faster
Nov 1, 2026 4:32 AM
Nov 1, 2026 4:31 AM
Oct 30, 2026 5:31 AM
The usual suspects behind Insomnia
Oct 30, 2026 5:31 AM
Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Oct 18, 2026.











