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Email headers
sender, ESP fingerprints, unsubscribe and auth headers
As received, minus the delivery side: the archive's own addresses appear as [recipient], relay hops and signatures are left out, and unsubscribe links are trimmed to their host.
- Received-SPF
- pass ([receiver]: domain of 6524.82.3d7d100000ebfb7.3b86c8a0d5a07bf4685827c8ea9322f2@event.f69e.squarespace-mail.com designates 142.0.181.5 as permitted sender) receiver=[receiver]; client-ip=142.0.181.5; envelope-from="6524.82.3d7d100000ebfb7.3b86c8a0d5a07bf4685827c8ea9322f2@event.f69e.squarespace-mail.com"; helo=out1-5.campaigns.f69e.squarespace-mail.com;
- Authentication-Results
- [receiver]; dkim=pass [email protected] header.s=squarespace header.b=vqj1IuHG; dkim=pass [email protected] header.s=squarespace header.b=7M7HDvxd; dmarc=pass header.from=mailers.basecamp.com policy.dmarc=quarantine; spf=pass ([receiver]: domain of [email protected] designates 142.0.181.5 as permitted sender) smtp.helo=out1-5.campaigns.f69e.squarespace-mail.com; spf=pass ([receiver]: domain of 6524.82.3d7d100000ebfb7.3b86c8a0d5a07bf4685827c8ea9322f2@event.f69e.squarespace-mail.com designates 142.0.181.5 as permitted sender) smtp.mailfrom=6524.82.3d7d100000ebfb7.3b86c8a0d5a07bf4685827c8ea9322f2@event.f69e.squarespace-mail.com; arc=none smtp.remote-ip=142.0.181.5
- x-xsMetaServerId
- 25892
- X-Thread-Info
- NjUyNC4xZS4zZDdkMTAwMDAwZWJmYjcuNmE1NmVkMzgwZWZiNzMyM2NhYTFjMGU0LS02MTFkNTcwYTQxNGQ4NDVjMmM1ZjI2YTYudCtvcHQtaW4uMzdzaWduYWxzPWluYm94YXJjaGl2ZS5vcmc=
- X-Website-Id
- 611d570a414d845c2c5f26a6
- From
- "37signals" <[email protected]>
- Message-ID
- <[email protected]>
- Date
- Wed, 15 Jul 2026 02:15:39 +0000
- Subject
- Confirm your subscription to 37signals
- MIME-Version
- 1.0
- Content-Type
- multipart/alternative; boundary="----CE734B42D8B04CC4B66404E5EADD46AA"
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