Pl. could you list your tried sample lines, I executed with the following and still getting the permission denied error (I also tried uncommenting sasl.php, tls=1, authentication_mechanism=""....same error).
require_once pop3.php");
// require{"sasl.php");
$pop3=new pop3_class;
$pop3->hostname="pop.bizmail.yahoo.com";
$pop3->port=995;
$pop3->tls=0;
$user="
[email protected]";
$password="pop3class";
$pop3->realm="";
$pop3->workstation="";
$apop=0;
$pop3->authentication_mechanism="USER";
$pop3->debug=1;
$pop3->html_debug=1;
$pop3->join_continuation_header_lines=1;
if(($error=$pop3->Open())=="")
{
echo "<PRE>Connected to the POP3 server "".$pop3->hostname."".</PRE>\n";
$error = $pop3->Login($user,$password, $apop);
echo "done";
} else print ($error);