Why most blue light glasses miss the mark
Preview text: It comes down to a single wavelength.
Using this email in an article? Credit: Felix Gray email via They Sent It, with a link to this page. Full-size image
- Subject
- Why most blue light glasses miss the mark
- Preview text
- It comes down to a single wavelength.
- From
- hello@
send.felixgray.com - Brand
- Felix Gray
- ESP
- Klaviyo
- Sent
- Sun Oct 4, 2026, 4:16 PM ET
- Sent to
- felixgray.com, filterbluelight.com
- Size
- 43 KB
- Images
- 9
- Links
- 12, 4 of them buttons
- Subject length
- 42 characters
Against Felix Gray's usual
Sent in the 4 PM hour, which holds 9% of its emails; 23% arrive in the 11 AM hour. The subject is 42 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
- Felix Gray <[email protected]>
- Reply-To
- [email protected]
- Subject
- Why most blue light glasses miss the mark
- Date
- Sun, 04 Oct 2026 20:16:31 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-51
- Return-Path domain
- send.felixgray.com
- DKIM signature
- d=felixgray.com s=kl2
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- by recvd-…-78qjm with SMTP
- from (unnamed) by geopod-ismtpd-51 with HTTP
Other sending headers (names only): X-Kmail-Account, X-Kmail-Flow, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID
Sent just before and after
| Oct 5, 2026 4:18 PM | A gift for you: 10% off | |
| Oct 5, 2026 1:30 PM | A teacher's secret to staying focused all day. | |
| Oct 5, 2026 3:31 AM | A closer look at what caught your eye | |
| Oct 4, 2026 4:16 PM | Why most blue light glasses miss the mark (this email) | |
| Oct 4, 2026 3:30 AM | Did something catch your eye? | |
| Oct 3, 2026 4:15 PM | A closer look at what caught your eye | |
| Oct 2, 2026 4:14 PM | Did something catch your eye? |
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Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Oct 4, 2026.
