$kime = "gidecek@adres.com";
$baslik = "Merhaba"
$mesaj = "Selam naber vs.<br>İyidir";
$headers = "MIME-Version: 1.0\n";
$headers .= "Content-type: text/html; charset=iso-8859-9\n";
$headers .= "X-Priority: 3\n";
$headers .= "X-MSmail-Priority: Normal\n";
$headers .= "X-mailer: php\n";
$headers .= "From: \"MD5\" <mail@adresim.com>\n";
$headers .= "Return-Path: postmaster@adresim.com\n";
$headers .= "Return-Receipt-To: postmaster@adresim.com"; 

mail($kime, $baslik, $mesaj, $headers);