gmail api html内联样式不适用

我正在使用Gmail的API,我试图发送以下代码作为邮件

例如:

我正在发送这个

<tr> <td style="font-family:Arial, Helvetica, sans-serif; font-size:9px;"> <a>Buy what you wish &amp; Get Flat 5% off Use: HOLIDAY5</a> </td> </tr> 

并在邮件中收到这个

  <tr> <td> <a>Buy what you wish &amp; Get Flat 5% off Use: HOLIDAY5</a> </td> </tr> 

我所有的内联样式都消失了

我的post请求是

  var from= 'From: '+name+' <'+email+'>\r\n'; var to='To: Me '+' <'+to+'>\r\n'; var subject= 'Subject: '+subj+'\r\n'; var mail='<html><body>'+sHTML+'</body></html>'; var message = from + to + subject + 'Content-Type: text/html; charset=utf-8\r\n' + 'Content-Transfer-Encoding: quoted-printable\r\n\r\n' + mail; var ss=new Buffer(message).toString('base64'); var rawdata = ss.replace(/\//g, '_').replace(/\+/g, '-'); 

//发送POST请求

 var headers={'Authorization': 'Bearer ' + google.accessToken} var options={contentType: "application/json"}; var res = HTTP.post('https://www.googleapis.com/gmail/v1/users/me/messages/send',{params: options,headers: headers,data: {'raw':rawdata}});