<message>
<header>
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Content-Type: image/jpeg; name="bluedot.jpg"</field>
<field>
Content-Disposition: inline; filename="bluedot.jpg"</field>
<field>
Content-Transfer-Encoding: base64</field>
<field>
Content-Id: my-graphic</field>
</header>
<body>
[encoded data, 5734 characters]
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