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The Science of Sleeping Cool

Not Just Soft. Smart.

Sunday CitizenTuesday, Sep 29, 2026 at 4:45 PM EasternKlaviyo
Sunday CitizenThe Science of Sleeping Cool
Subject
The Science of Sleeping Cool
Preview text
Not Just Soft. Smart.
From
hello@sundaycitizen.co
Sent
Tue Sep 29, 2026, 4:45 PM ET
Sent to
Colombia (sundaycitizen.co), sundaycitizen.com
Size
54 KB
Images
18
Links
19, 2 of them buttons
Subject length
28 characters

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Sent in the 4 PM hour, which holds 12% of its emails; 14% arrive in the 6 PM hour. The subject is 28 characters; its average is 30.

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From
Sunday Citizen <[email protected]>
Subject
The Science of Sleeping Cool
Date
Tue, 29 Sep 2026 20:45:05 +0000 (UTC)
Message-ID domain
geopod-ismtpd-112
Return-Path domain
send.sundaycitizen.co
DKIM signature
d=sundaycitizen.co s=kl2
List-Unsubscribe
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  1. by recvd-…-ntwsv with SMTP
  2. from (unnamed) by geopod-ismtpd-112 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

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Sent just before and after

Oct 3, 2026 9:45 AMThe Fall Bundle Edit: Up to 25% Off
Oct 2, 2026 2:03 PMThe Fall Edit: Up to 25% Off
Oct 1, 2026 3:30 PMYour Fall Bed Is Calling
Sep 29, 2026 4:45 PMThe Science of Sleeping Cool (this email)
Sep 28, 2026 2:30 PMEnds Soon: 40% Off Selected Snug Comforters
Sep 26, 2026 11:45 AM40% Off Snug Comforters
Sep 24, 2026 3:30 PMConsider Your Plans Canceled

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