Problema funcion mail

[karpoj23]

YA encontre una funcion:

function ValidarDatos($campo)
{
$badHeads = array("Content-Type:",
"MIME-Version:",
"Content-Transfer-Encoding:",
"Return-path:",
"Subject:",
"From:",
"Envelope-to:",
"To:",
"bcc:",
"cc:");

foreach($badHeads as $valor)
{
if(strpos(strtolower($campo), strtolower($valor)) !== false)
{
echo "Sorry Access Denied.";
exit();
}
}
}