Engineering Indoor Sunlight
Preview text: How we built Sunday Light
- Subject
- Engineering Indoor Sunlight
- Preview text
- How we built Sunday Light
- From
- enquiries@
sundaylight.cc - Brand
- Sunday Light
- ESP
- Klaviyo
- Sent
- Sun Oct 18, 2026, 6:06 AM ET
- Size
- 49 KB
- Images
- 20
- Links
- 20, 5 of them buttons
- Subject length
- 27 characters
Against Sunday Light's usual
Sent in the 6 AM hour, which holds 14% of its emails; 48% arrive in the 7 AM hour. The subject is 27 characters; its average is 29.
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
- Sunday Light <[email protected]>
- Subject
- Engineering Indoor Sunlight
- Date
- Sun, 18 Oct 2026 10:06:08 +0000
- Message-ID domain
- klaviyomail.com
- Return-Path domain
- k3.send.sundaylight.cc
- DKIM signature
- d=shared.klaviyomail.com s=def1; d=send.sundaylight.cc 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 23, 2026 1:04 PM | An upside to the clocks going back | |
| Oct 21, 2026 12:00 PM | Will Sunday work in your room? | |
| Oct 21, 2026 6:02 AM | Living with Sunday | |
| Oct 18, 2026 6:06 AM | Engineering Indoor Sunlight (this email) | |
| Oct 16, 2026 12:04 PM | "The healthiest light for your home" | |
| Oct 16, 2026 6:03 AM | The Science of Bright Light | |
| Oct 14, 2026 4:41 AM | Welcome to Sunday Light |
More from Sunday Light
All Sunday Light emails“A literal game changer for energy and sleep.”
Oct 30, 2026 1:00 PM
You already know you need morning light
Oct 25, 2026 7:04 AM
An upside to the clocks going back
Oct 23, 2026 1:04 PM
Will Sunday work in your room?
Oct 21, 2026 12:00 PM
Oct 21, 2026 6:02 AM
"The healthiest light for your home"
Oct 16, 2026 12:04 PM
Oct 16, 2026 6:03 AM
Oct 14, 2026 4:41 AM
