smtp_send_mail_ex(&smtp1, "SendMail",
"To=user@gmail.com",
"Cc=user@163.com",
"From=test@163.com",
"Subject=smtp test mail",
"ContentType=text/plain;",
"charset=\"Windows-1252\"",
MAILOPTIONS,
"X-Priority: 3",
"X-MSMail-Priority: Normal",
"X-Mailer: Microsoft Outlook Express 6.00.2800.1437",
"X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441",
MAILDATA,
"MessageText=SGksTWFu\r\n",
LAST);