<message>
<header>
<field>
Content-Type: multipart/mixed; boundary="boundary"</field>
</header>
<multipart>
<preamble>
</preamble>
<body-part>
<header>
<field>
Content-Type: text/plain</field>
</header>
<body>
This should be a text including the --boundary
string and should not be parsed as multiple bodies
</body>
</body-part>
<epilogue>
epilouge
</epilogue>
</multipart>
</message>