Mail

$Headers = "To: User Name <".$to.">\n";
$Headers .= "From: Dej to tam.cz <admin@dejtotam.cz>\n";
$Headers .= "MIME-Version: 1.0\n";
$Headers .= "Content-Type: text/html; charset=windows-1250\n";

....

@mail($To, $Subject, $Message, $Headers);