<form action="https://formspree.io/your@email.com" method="POST">
  <label for="name">Name:</label>
  <input type="text" id="name" name="user_name" />
  <label for="mail">E-mail:</label>
  <input type="email" id="mail" name="user_mail" />
  <label for="msg">Message:</label>
  <textarea id="msg" name="user_message"></textarea>
  <button type="submit">Send your message</button>
</form>