What caffeine actually does to your brain
Preview text: It's not really giving you energy. Here's what it's actually doing.

Using this email in an article? Credit: CardoMax email via They Sent It, with a link to this page. Full-size image
- Subject
- What caffeine actually does to your brain
- Preview text
- It's not really giving you energy. Here's what it's actually doing.
- From
- orders@
cardomax.com - Brand
- CardoMax
- ESP
- Klaviyo
- Sent
- Mon Sep 21, 2026, 2:30 PM ET
- Size
- 48 KB
- Images
- 17
- Links
- 17, 4 of them buttons
- Subject length
- 41 characters
Against CardoMax's usual
Sent in its busiest hour, 2 PM, which holds 38% of its emails. The subject is 41 characters; its average is 33.
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
- CardoMax <[email protected]>
- Reply-To
- [email protected]
- Subject
- What caffeine actually does to your brain
- Date
- Mon, 21 Sep 2026 18:30:39 +0000 (UTC)
- Message-ID domain
- geopod-ismtpd-114
- Return-Path domain
- email.cardomax.com
- DKIM signature
- d=cardomax.com s=kl2
- List-Unsubscribe
- Present, one-click
Servers it passed through, newest first
- by recvd-canary-…-s5jfw with SMTP
- from (unnamed) by geopod-ismtpd-114 with HTTP
Other sending headers (names only): X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID
Sent just before and after
| Sep 29, 2026 2:30 PM | It's National Coffee Day, we're biased | |
| Sep 25, 2026 2:30 PM | The Thing Water Can't Actually Replace | |
| Sep 23, 2026 2:30 PM | Answers to the questions you probably have | |
| Sep 21, 2026 2:30 PM | What caffeine actually does to your brain (this email) | |
| Sep 18, 2026 2:31 PM | There's more to CardoMax than energy | |
| Sep 16, 2026 2:30 PM | How to actually use CardoMax | |
| Sep 15, 2026 1:48 AM | Don’t Miss This One |
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Same ESP and the closest weekly volume, sent on Sep 21, 2026.








