Authentication-Results: example.com;
          auth=pass (cram-md5) smtp.auth=sender@example.net;
          spf=pass smtp.mailfrom=example.net
Authentication-Results: example.com; iprev=pass
          policy.iprev=192.0.2.200
Received: from dialup-1-2-3-4.example.net (8.11.6/8.11.6)
              (dialup-1-2-3-4.example.net [192.0.2.200])
          by mail-router.example.com (8.11.6/8.11.6)
              with ESMTPA id g1G0r1kA003489;
          Fri, Feb 15 2002 17:19:07 -0800
Date: Fri, Feb 15 2002 16:54:30 -0800
To: receiver@example.com
From: sender@example.net
Message-Id: <12345.abc@example.net>
Subject: here's a sample

Hello!  Goodbye!