Nefunkční odesílání mailu více uživatelům

<?
$dbconn = mysql_connect('xxx', 'xxx', 'xxx') or die("Unable to connect to MySQL");

  mysql_select_db("mojeDB",$dbconn);
  
  $mail  = mysql_fetch_array (mysql_query ('SELECT s_contact_email
          FROM `oc_t_item`
          WHERE pk_i_id
                IN (SELECT fk_i_item_id
                FROM `oc_t_item_custom_attr_values`
                WHERE s_value = CURRENT_DATE( )
          )
          ORDER BY pk_i_id ASC'));          

          
  $description = mysql_fetch_array (mysql_query ('SELECT s_description
          FROM `oc_t_item_description`
          WHERE fk_i_item_id
                IN (SELECT fk_i_item_id
                FROM `oc_t_item_custom_attr_values`
                WHERE s_value = CURRENT_DATE( )
         )
         ORDER BY `fk_i_item_id` ASC'));
     
  //Check if entry exists
  if($entry !== 0){
    $message = $description['s_description'];
    $to = $mail['s_contact_email'];
    $from = "admin@neco.cz";
    $subject = "test";
    $headers = "MIME-Version: 1.0\r\n";
    $headers .= "Content-type: text/html; charset=windows-1250-l\r\n";
    $headers .= "From: $from\r\n";
    
    
    if(mail($to, $subject, $message, $headers)){
      echo 'Email sent';
    }else{
      echo 'Failed sending email';
    }
  }else{
    echo 'No email entry found';
  }                    
  mysql_close($dbconn);
  ?>