Mailist filter from empass

<!DOCTYPE html>
<html>
<head>
    <title>Mailist Filter From EmPass</title>
<meta charset="utf-8">
<meta name="author" content="shutdown57">
</head>
<body>
<!--
DEVSEX NGENTOD
-->
<center>
<h1>Mailist Filter</h1>
<?php
if(isset($_POST['submitx']))
{
$pisah=explode("\r\n",$_POST['empass']);
foreach($pisah as $pepek){

$mail=explode(":",$pepek);
@$email.=$mail[0]."\n";
}
echo "Result : <a href='?ngewe'>Kembali Kehatimu</a><br>";
echo "<textarea style='width:500px;height:400px;'>";
echo $email;
echo "</textarea>";
}else{
?>
<form method="POST">
    <textarea name="empass" style="width:500px;height:400px;"></textarea><br>
    <input type="submit" name="submitx" value="Ngewe Kuy!!">
</form>
<?php
}
?>
</body>
</html>