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
- Thu Sep 10, 2026, 6:22 PM ET
- Sent to
- felixgray.com, getfelixgray.com, whybluelight.com
- Size
- 43 KB
- Images
- 9
- Links
- 12, 4 of them buttons
- Subject length
- 42 characters
Against Felix Gray's usual
Sent in the 6 PM hour, which holds 7% 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
- Thu, 10 Sep 2026 22:22:56 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-59
- 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-…-sfsxt with SMTP
- from (unnamed) by geopod-ismtpd-59 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
| Sep 11, 2026 6:23 PM | A gift for you: 10% off | |
| Sep 11, 2026 12:00 PM | Peak performance from a pair of glasses. Here's how the (W)NBA does it. | |
| Sep 11, 2026 11:43 AM | Your 20% off expires soon | |
| Sep 10, 2026 6:22 PM | Why most blue light glasses miss the mark (this email) | |
| Sep 10, 2026 2:58 PM | 1,900+ people can't be wrong - plus 15% off | |
| Sep 9, 2026 6:21 PM | A closer look at what caught your eye | |
| Sep 9, 2026 2:57 PM | 3 reasons Felix Gray outperforms every other blue light lens. |
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Oops, your 10% off is expiring
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Nov 4, 2026 10:00 AM
Don't Cut Screen Time, Cut The Blue Light
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Nov 2, 2026 1:27 PM
Sent the same day by similar brands
Same ESP and the closest weekly volume, sent on Sep 10, 2026.
