Subject: test
Content-Type: multipart/mixed;
 boundary="------------050001060707010906080502"

This is a multi-part message in MIME format.
--------------050001060707010906080502
Content-Type: text/plain; charset=ISO-2022-JP
Content-Transfer-Encoding: 7bit

test

--------------050001060707010906080502
Content-Type: text/plain;
 name="File1"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
 filename="File1"

gr2Cog0KgqANCg==

--------------050001060707010906080502
Content-Type: text/plain;
 name="File1(1)"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
 filename="File1(1)"

gr2Cog0KgqANCg==

--------------050001060707010906080502
Content-Type: text/plain;
 name="File1"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
 filename="File1"

gr2Cog0KgqANCg==
--------------050001060707010906080502--
.
