ARC-Seal: i=2; a=rsa-sha256; cv=pass; d=list.example; s=arcfeb2026; t=1771200002;
	b=SAMPLEsignatureBase64Placeholder00000000000000000000000000000000/NOTREAL=
ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=list.example; s=arcfeb2026;
	h=from:to:subject:date:message-id;
	bh=SAMPLEbodyHashBase64Placeholder0000000000000=;
	b=SAMPLEsignatureBase64Placeholder00000000000000000000000000000000/NOTREAL=
ARC-Authentication-Results: i=2; list.example;
	spf=pass smtp.mailfrom=brightside.example;
	dkim=pass header.d=brightside.example;
	dmarc=pass header.from=brightside.example
ARC-Seal: i=1; a=rsa-sha256; cv=none; d=list.example; s=arcfeb2026; t=1771200001;
	b=SAMPLEsignatureBase64Placeholder00000000000000000000000000000000/NOTREAL=
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=list.example; s=arcfeb2026;
	h=from:to:subject:date:message-id;
	bh=SAMPLEbodyHashBase64Placeholder0000000000000=;
	b=SAMPLEsignatureBase64Placeholder00000000000000000000000000000000/NOTREAL=
ARC-Authentication-Results: i=1; list.example;
	spf=pass smtp.mailfrom=brightside.example;
	dkim=pass header.d=brightside.example;
	dmarc=pass header.from=brightside.example
Authentication-Results: mx1.meridiansupply.example;
	arc=pass (i=2 SAMPLE chain);
	spf=pass smtp.mailfrom=list.example;
	dkim=fail header.d=brightside.example;
	dmarc=fail (p=NONE) header.from=brightside.example
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brightside.example; s=feb2026; t=1771200000;
	h=from:to:subject:date:message-id;
	bh=SAMPLEbodyHashBase64Placeholder0000000000000=;
	b=SAMPLEsignatureBase64Placeholder00000000000000000000000000000000/NOTREAL=
From: Maya Chen <maya@brightside.example>
To: Sam Rivera <sam@meridiansupply.example>
Subject: Forwarded post with a two-hop ARC chain
Date: Tue, 17 Feb 2026 08:25:00 -0800
Message-ID: <p7-auth-arc@brightside.example>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

The authentication headers are the fixture; the body is filler.
Every DKIM and ARC value in this message is a visible SAMPLE placeholder
and will not verify against any key.