From: Alex SAMPLE <alex@brightside.example>
To: Sam Rivera <sam@meridiansupply.example>
Subject: DKIM shape SAMPLE
Date: Wed, 22 Jul 2026 09:25:00 -0400
Message-ID: <wi-dkim@brightside.example>
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brightside.example;
 s=selector1; h=from:to:subject:date; bh=SAMPLEBASE64==; b=SAMPLEBASE64==
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8

DKIM header shape SAMPLE (not a valid signature).