<div class="layout-2col">
  <div class="col form-email">
    <h3><a href="http://groups.google.com/group/django-users">django-users</a></h3>
    <p class="meta">Get help with Django and follow announcements.</p>
    <form class="form-input" action="http://groups.google.com/group/django-users/boxsubscribe">
      <input type="email" name="email" placeholder="Enter email">
      <button type="submit">
        <i class="icon icon-envelope-o"></i>
        <span class="visuallyhidden">Subscribe</span>
      </button>
    </form>
  </div>
  <div class="col form-email last-child">
    <h3><a href="http://groups.google.com/group/django-developers">django-developers</a></h3>
    <p class="meta">Contribute to the development of Django itself.</p>
    <form class="form-input" action="http://groups.google.com/group/django-developers/boxsubscribe">
      <input type="email" name="email" placeholder="Enter email">
      <button type="submit">
        <i class="icon icon-envelope-o"></i>
        <span class="visuallyhidden">Subscribe</span>
      </button>
    </form>
  </div>
</div>

<div class="layout-2col">
  <div class="col form-email">
    <h3><a href="http://groups.google.com/group/django-users">django-users</a></h3>
    <p class="meta">Get help with Django and follow announcements.</p>
    <form class="form-input" action="https://groups.google.com/group/django-users/boxsubscribe">
      <input type="email" name="email" placeholder="Enter email">
      <button type="submit">
        <i class="icon icon-envelope-o"></i>
        <span class="visuallyhidden">Subscribe</span>
      </button>
    </form>
  </div>
  <div class="col form-email last-child">
    <h3><a href="http://groups.google.com/group/django-developers">django-developers</a></h3>
    <p class="meta">Contribute to the development of Django itself.</p>
    <form class="form-input" action="https://groups.google.com/group/django-developers/boxsubscribe">
      <input type="email" name="email" placeholder="Enter email">
      <button type="submit">
        <i class="icon icon-envelope-o"></i>
        <span class="visuallyhidden">Subscribe</span>
      </button>
    </form>
  </div>
</div>

Use HTTPS urls for subscription urls
Use HTTPS urls for subscription urls