<div class="btn-list">
  <div class="btn btn-primary btn-dropdown dropdown">
    Primary Dropdown
    <ul class="dropdown-menu">
      <li><a class="dropdown-link">Add new Sender</a></li>
      <li><a class="dropdown-link">Add new IP</a></li>
      <li><a class="dropdown-link">Add new Template</a></li>
    </ul>
  </div>
</div>