check OK変換後文字:
MIME-Version: 1.0 Content-Type: multipart/alternative;boundary=4390bac4ad69b7267d998fd01781ced3; charset=Shift_JIS From: Reply-To: --4390bac4ad69b7267d998fd01781ced3 Content-Transfer-Encoding: base64 Content-type: text/plain;charset=Shift_JIS --4390bac4ad69b7267d998fd01781ced3 Content-Transfer-Encoding: base64 Content-type: text/html;charset=Shift_JIS --4390bac4ad69b7267d998fd01781ced3--send to : NG