function mailgonder($ad,$soyad,$mail,$konu,$mesaj) { 

$g_mail = "xxx@xxxxx.tr";  
$g_isim = "yyyy";  
$giden = "$ad $soyad <$mail>";     
$baslik = "$konu";   // sorun burada 

$mesaj = "$mesaj";  

$header = "From: $g_isim <".$g_mail.">\n";   
$header .= "Reply-To: $g_isim <".$g_mail.">\n";  
$header .= "Return-Path: $g_isim <".$g_mail.">\n";    
$header .= "Delivered-to:  $g_isim <".$g_mail.">\n";  
$header .= "Date: ".date(r)."\n";  
$header .= "Content-Type: text/html; charset=ISO-8859-9\n";     
$header .= "MIME-Version: 1.0\n";  
$header .= "Importance: Normal\n";  
$header .= "X-Sender: $g_isim <".$g_mail.">\n";     
$header .= "X-Priority: 3\n";     
$header .= "X-MSMail-Priority: Normal\n";  
$header .= "X-Mailer: Microsoft Office Outlook, Build 11.0.5510\n";  
//$header .= "Disposition-Notification-To: $g_isim <".$g_mail.">\n";  
$header .= "X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869\n";  

$sonuc = mail($giden, $baslik, $mesaj, $header);  
     
    return $sonuc; 
     
}