netlify_form_without.html

<form
  name="contact-form"
  action="/message"
  method="post"
  netlify
  netlify-honeypot="bot-field"
>
  <input type="hidden" name="bot-field" />
  <input name="name" type="text" required />
  <input name="email" type="email" required />
  <input name="subject" type="text" required />
  <textarea name="message" required></textarea>
  <button type="submit">Submit</button>
</form>