function createDraftHTMLEmail(){
  
  var forScope = GmailApp.getInboxUnreadCount();
  
  var r = new RAW_();
  r.from = 'Me <' + 'test@test.test' + '>';
  r.to = 'You <'+ 'test@test.test' +'>';
  r.subject = 'testing createDraftHTMLEmail';
  r.body = '<html><body>' + '<h1>World</h1>Проверка <a href="http://google.com" target="_blank"> LINK </a>' + '</body></html>';
  
  var draftBody = r.encode();
  
  var params = {
    method: 'post',
    contentType: 'application/json',               
    headers: {
      'Authorization': 'Bearer ' + ScriptApp.getOAuthToken()
    },
    muteHttpExceptions:true,
    payload:JSON.stringify({
      'message': {
        'raw': draftBody
      }
    })
  };
  
  var resp = UrlFetchApp.fetch('https://www.googleapis.com/gmail/v1/users/me/drafts', params);
}