They Sent It

It’s the longest day of the year

In more ways than one.

Manta SleepSunday, Jun 21, 2026 at 10:01 AM EasternKlaviyo
Manta SleepIt’s the longest day of the year
Subject
It’s the longest day of the year
Preview text
In more ways than one.
From
support@mantasleep.com
Sent
Sun Jun 21, 2026, 10:01 AM ET
Sent to
mantasleep.com
Size
40 KB
Images
15
Links
16, 5 of them buttons
Subject length
33 characters

Against Manta Sleep's usual

Sent in its busiest hour, 10 AM, which holds 18% of its emails. The subject is 33 characters; its average is 29.

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From
Manta Sleep <[email protected]>
Subject
It’s the longest day of the year
Date
Sun, 21 Jun 2026 14:01:13 +0000 (UTC)
Message-ID domain
geopod-ismtpd-13
Return-Path domain
klaviyo.mantasleep.com
DKIM signature
d=mantasleep.com s=kl2
List-Unsubscribe
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  1. from o1355.shared.klaviyomail.com [167.89.100.40] by our receiving server with ESMTPS
  2. by recvd-…-mc5tg with SMTP
  3. from (unnamed) by geopod-ismtpd-13 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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