メール送信用Google App Script

sendTestMail.gs

function sendTestMail(e) { 
  var html = HtmlService.createHtmlOutputFromFile("message").getContent();
  var items = e.response.getItemResponses();
  var mailDom = '';
  var mailTo = '';
  var title = '';
  items.forEach(function(item){
    switch(item.getItem().getTitle()){
      case 'mailDom':
        mailDom = item.getResponse();
        break;
      case 'mailTo':
        mailTo = item.getResponse();
        break;
      case 'title':
        title = item.getResponse();
    }
  })

  MailApp.sendEmail({
    to: mailTo,
    subject: title || 'HTMLメール送信テスト',
    htmlBody: mailDom
  });
}