[Free Template] Step-by-Step Guide to Google Forms Email Confirmation Automation

const CONFIG = {
  formTitle: 'Contact Request Form',
  ownerEmail: 'YOUR_EMAIL@gmail.com',
  ownerName: 'Your Website Name',
  emailSubjectToSender: 'We received your message',
  emailSubjectToOwner: 'New Google Form submission'
};
function setupAutoEmailForm() {
  deleteExistingProjectTriggers_();
  const form = FormApp.create(CONFIG.formTitle);
  form.setDescription('Fill this form and you will receive an automatic email confirmation.');
  form.setConfirmationMessage('Thank you. Please check your email for confirmation.');
  form.setAcceptingResponses(true);
  const emailValidation = FormApp.createTextValidation()
    .requireTextIsEmail()
    .setHelpText('Please enter a valid email address.')
    .build();
  form.addTextItem()
    .setTitle('Name')
    .setRequired(true);
  form.addTextItem()
    .setTitle('Email')
    .setRequired(true)
    .setValidation(emailValidation);
  form.addParagraphTextItem()
    .setTitle('Message')
    .setRequired(true);
  const sheet = SpreadsheetApp.create(`${CONFIG.formTitle} Responses`);
  form.setDestination(FormApp.DestinationType.SPREADSHEET, sheet.getId());
  PropertiesService.getScriptProperties().setProperties({
    FORM_ID: form.getId(),
    SHEET_ID: sheet.getId()
  });
  ScriptApp.newTrigger('sendEmailOnSubmit')
    .forForm(form)
    .onFormSubmit()
    .create();
  Logger.log('Form edit URL: ' + form.getEditUrl());
  Logger.log('Form public URL: ' + form.getPublishedUrl());
  Logger.log('Responses sheet URL: ' + sheet.getUrl());
}
function sendEmailOnSubmit(e) {
  if (!e || !e.response) {
    throw new Error('This function must run from the form submit trigger.');
  }
  const answers = getAnswers_(e.response);
  const name = answers['Name'] || 'there';
  const email = answers['Email'];
  const message = answers['Message'] || '';
  if (!email) {
    throw new Error('Email field is missing.');
  }
  const senderHtml = `
    <p>Hi ${escapeHtml_(name)},</p>
    <p>Thank you for contacting us. We received your message:</p>
    <blockquote>${escapeHtml_(message).replace(/\n/g, '<br>')}</blockquote>
    <p>We will reply as soon as possible.</p>
  `;
  MailApp.sendEmail({
    to: email,
    subject: CONFIG.emailSubjectToSender,
    htmlBody: senderHtml,
    body: `Hi ${name},\n\nThank you for contacting us. We received your message:\n\n${message}\n\nWe will reply as soon as possible.`,
    name: CONFIG.ownerName,
    replyTo: CONFIG.ownerEmail
  });
  const ownerHtml = `
    <p>New form submission:</p>
    <ul>
      <li><strong>Name:</strong> ${escapeHtml_(name)}</li>
      <li><strong>Email:</strong> ${escapeHtml_(email)}</li>
    </ul>
    <p><strong>Message:</strong></p>
    <blockquote>${escapeHtml_(message).replace(/\n/g, '<br>')}</blockquote>
  `;
  MailApp.sendEmail({
    to: CONFIG.ownerEmail,
    subject: CONFIG.emailSubjectToOwner,
    htmlBody: ownerHtml,
    body: `New form submission:\n\nName: ${name}\nEmail: ${email}\nMessage:\n${message}`,
    replyTo: email
  });
}
function getAnswers_(formResponse) {
  const answers = {};
  formResponse.getItemResponses().forEach((itemResponse) => {
    const title = itemResponse.getItem().getTitle();
    const answer = itemResponse.getResponse();
    answers[title] = Array.isArray(answer) ? answer.join(', ') : String(answer || '');
  });
  return answers;
}
function deleteExistingProjectTriggers_() {
  ScriptApp.getProjectTriggers().forEach((trigger) => {
    if (trigger.getHandlerFunction() === 'sendEmailOnSubmit') {
      ScriptApp.deleteTrigger(trigger);
    }
  });
}
function escapeHtml_(value) {
  return String(value)
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#039;');
}
function showLinks() {
  const props = PropertiesService.getScriptProperties();
  const form = FormApp.openById(props.getProperty('FORM_ID'));
  const sheet = SpreadsheetApp.openById(props.getProperty('SHEET_ID'));
  Logger.log('Form edit URL: ' + form.getEditUrl());
  Logger.log('Form public URL: ' + form.getPublishedUrl());
  Logger.log('Responses sheet URL: ' + sheet.getUrl());
}