在Google脚本中使用rtl

如何解决在Google脚本中使用rtl

我正在使用Google表格发送带有Google脚本（Gmailapp）的消息。由于电子邮件是用波斯语撰写的，因此应从右到左显示；但是，这不是我所期望的。你有什么想法可以让它成为rtl吗？

function sendEmails2() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var startRow = 2; // First row of data to process
  var numRows = 2; // Number of rows to process
  // Fetch the range of cells A2:B3
  var datarange = sheet.getRange(startRow,1,numRows,3);
  // Fetch values for each row in the Range.
  var data = datarange.getValues();
  for (var i = 0; i < data.length; ++i) {
    var row = data[i];
    var emailAddress = row[1]; // First column
    var message = 'سلام '+row[0]+' عزیز،'+" \n"+row[2];
    var html= '<body>' +  '<h1 dir="rtl"> message </h1>' + '</body>'
    var alias=GmailApp.getAliases()
    var emailSent = row[4]; // Third column
    if (emailSent !== EMAIL_SENT) { // Prevents sending duplicates
      var subject = 'نظرسنجی';
      GmailApp.sendEmail(emailAddress,subject,message,{from: alias[0],htmlbody: html});
      sheet.getRange(startRow + i,4).setValue(EMAIL_SENT);
      // Make sure the cell is updated right away in case the script is interrupted
      SpreadsheetApp.flush();
    }
  }
}