Mailchimp

Step 1: Setup API Key

Step 2: Setup Form

This is code form:

<div class="ova-mc4wp-form">		
  <div class="email">
    <label>
      <span class="visuallyhidden">Email</span>
      <input type="email" name="email" placeholder="Enter address" required />
    </label>
  </div>
  <div class="submit">
    <button type="submit" aria-label="submit">
      <span class="visuallyhidden">Subscribe</span>
      <i class="flaticon flaticon-paper-plane" aria-hidden="true"></i>
    </button>
  </div>
</div>
<p class="visuallyhidden">
    <label>
       <input name="_mc4wp_lists[]" type="checkbox" value="Ovatheme" checked>
       <span>Ovatheme</span>
    </label>
</p>