function createDraft(timestamp, email, emailBody) {
  console.log('draft email create process started');

  // create subject line
  let subjectLine = 'Thanks for your course feedback! ' + timestamp;

  // create draft email
  GmailApp.createDraft(
      email,
      subjectLine,
      '',
      {
        htmlBody: emailBody,
      }
  );
}
Create a draft email with the feedback

@param {string} timestamp Timestamp for the form response
@param {string} email Email address from the form response
@param {string} emailBody The email body as an HTML string