Return-Path: <bounce@example.com>
Delivered-To: seed-02@example.org
Received: from mail2.example.com (mail2.example.com [198.51.100.31])
        by mx.example.org with ESMTPS id 5a6b7c8d
        (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128)
        for <seed-02@example.org>; Thu, 15 Oct 2026 10:00:09 +0000
Authentication-Results: mx.example.org;
       spf=pass (example.com: domain of bounce@example.com designates 198.51.100.31 as permitted sender) smtp.mailfrom=example.com;
       dkim=pass header.d=example.com header.s=cio1 header.b=QWNtZVBy;
       dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=example.com
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=example.com; s=cio1;
        h=from:to:subject:date:message-id:list-unsubscribe:list-unsubscribe-post:mime-version:content-type;
        bh=RmljdGlvbmFsUHJlZnNVcmxCb2R5SGFzaEFjbWU=;
        b=QWNtZVByZWZzVXJsRmljdGlvbmFsU2lnbmF0dXJlTm90VmFsaWRBbnl3aGVyZQ==
From: Acme Reports <updates@example.com>
To: seed-02@example.org
Subject: What is new in Acme Reports this month
Date: Thu, 15 Oct 2026 10:00:02 +0000
Message-ID: <p1prefs.oct26@example.com>
List-Unsubscribe: <https://example.com/one-click/opaque-token-p1>
List-Unsubscribe-Post: List-Unsubscribe=One-Click
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="acme-p1"

--acme-p1
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit

Three new chart types arrived this month.

See them: https://app.example.com/whats-new

You get product news because you use Acme Reports.
Manage your preferences: https://example.com/unsubscribe/preferences?t=opaque-token-p1

--acme-p1
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 7bit

<html><body>
<p>Three new chart types arrived this month.</p>
<p><a href="https://app.example.com/whats-new">See them</a></p>
<p style="font-size:12px">You get product news because you use Acme Reports.
<a href="https://example.com/unsubscribe/preferences?t=opaque-token-p1">Manage preferences</a></p>
</body></html>

--acme-p1--
