<table class="table table-striped table-hover table-sm">
   <tr class="bg-dark text-light">
      <th class="hidden-xs">Nome</th>
      <th>Email</th>
      <th class="text-center" style="width: 1em;">Marcar</th>
      <th class="text-center" style="width: 1em;">Ação</th>
    </tr>
    <?php
      $count = 0;
      foreach($result as $row) {
        $count = $count + 1;
          echo '
            <tr>
                <td class="hidden-xs">'.$row["customer_name"].'</td>
                <td>'.$row["customer_email"].'</td>
                <td class="text-center">
                   <label class="label--checkbox">
                     <input type="checkbox" name="single_select" class="single_select checkbox" data-email="'.$row["customer_email"].'" data-name="'.$row["customer_name"].'" />
                   </label>
                </td>
                <td>
                   <button type="button" name="email_button" class="btn btn-gray rounded btn-xs email_button btn-row-acao-enviar" id="'.$count.'" data-email="'.$row["customer_email"].'" data-name="'.$row["customer_name"].'" data-action="single">Enviar</button>
               </td>
           </tr>
          ';
         }
      ?>
</table>