Description:
------------
Cannot send e-mails using SMTP in PEAR Mail package.

Reproduce code:
---------------
PEAR Mail Package:
http://pear.php.net/package/Mail

<?php
require_once("Mail.php");

// PEAR Mail
$smtp = Mail::factory
(
	"smtp",
	array
	(
		"localhost" => "localhost",
		"host" => "localhost",
		"auth" => false
	)
);

$headers = array
(
	"From" => "tesing@testing.com <testing>",
	"Subject" => "some subject",
	"To" => "someone@something.com",
	"Content-Type" => "text/html; charset=iso-8859-1",
	"MIME-Version" => "1.0"
);

$smtp->send($to, $headers, "message");
?>

Expected result:
----------------
Send the e-mail using the class without problems.

IIS 6 with PHP 5.2.11 no additional extensions.
STMP is provided by MailEnable 3.61

Actual result:
--------------
Don't show any error on php, between the e-mail is not send.
I can send it using mail() function without problems.

Downgrading to 5.2.10, works fine again, no code changes.