Why most blue light glasses miss the mark
Preview text: It comes down to a single wavelength.

Use this example
- 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 11, 2026, 2:22 PM ET
- Sent to
- filterbluelight.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 2 PM hour, which holds 11% 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, 11 Oct 2026 18:22:48 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-41
- 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-…-fl9xg with SMTP
- from (unnamed) by geopod-ismtpd-41 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 12, 2026 2:40 AM | A closer look at what caught your eye | |
| Oct 11, 2026 9:01 PM | 3 reasons Felix Gray outperforms every other blue light lens. | |
| Oct 11, 2026 7:09 PM | 1,900+ people can't be wrong - plus 15% off | |
| Oct 11, 2026 2:22 PM | Why most blue light glasses miss the mark (this email) | |
| Oct 11, 2026 3:40 AM | Oops, your 10% off is expiring | |
| Oct 11, 2026 2:39 AM | Did something catch your eye? | |
| Oct 10, 2026 9:00 PM | Your 15% off is waiting for you |
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A closer look at what caught your eye
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Oops, your 10% off is expiring
Nov 4, 2026 4:46 PM
Your Favorites In New Colors, Now In Stock
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Don't Cut Screen Time, Cut The Blue Light
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Nov 2, 2026 1:27 PM







