What Am I Missing - Using Windows Web & Linux SMTP Serve

[djbranson]

I have a client-side html form calling a php script in that same directory, which is supposed to send an SMTP-authenticated email message. The php has:

<?php
require_once "Mail.php";

$first_name = $_REQUEST['first_name'];
$last_name = $_REQUEST['last_name'];
$email = $_REQUEST['email'];
$zip_code = $_REQUEST['zip_code'];

$from = $email;
$to = "me@mydomain.com";
$subject = "My Test Email";
$body = $first_name . " " . $last_name . "\n" . $email . "\n" . $zip_code;

$host = "mail.mysmtphost.com";
$username = "myusername";
$password = "mypassword";

$headers = array ('From' => $from,
'To' => $to,
'Subject' => $subject);
$smtp = Mail::factory('smtp',
array ('host' => $host,
'auth' => true,
'username' => $username,
'password' => $password));

$mail = $smtp->send($to, $headers, $body);

if (PEAR::isError($mail)) {
echo("<p>" . $mail->getMessage() . "</p>");
} else {
echo("<p>Message successfully sent! Press 'Back'</p>");
}
?>

When my html form gets the data and calls the php script, I get the following messages:

Warning: require_once(Mail.php) [function.require-once]: failed to open stream: No such file or directory in C:\...\m_request.php on line 2

Fatal error: require_once() [function.require]: Failed opening required 'Mail.php' (include_path='.;C:\php5\pear') in C:\...\m_request.php on line 2

Any suggestions you might have would be appreciated.

*** Added Note: I tried the form & php script using the simple Mail() function and it worked perfectly with my Linux Mail Server from my Windows XP-based development computer WITHOUT SMTP, but when I moved the webpage and script over to my Windows 2000 Web Server, I got the message that SMTP was required to work with that same Linux Mail Server... that is a bit confusing to me.