$giden = "gidenmail@sitem.com";
                $mesaj = "Bu Bir Mail";
                $header .= "Reply-To: Mail Basligi<mail@sitem.com>\r\n"; 
                $header .= "Return-Path: Mail Basligi <mail@sitem.com>\r\n"; 
                $header .= "From: Mail Basligi <mail@sitem.com>\r\n"; 
                $header .= "Content-Type: text/plain\r\n"; 
                mail($giden, $mesaj, $header);