Need help with configuring local pc with IIS to send email so I can test PHP scripts

I've been using php for a while but this is the first time I've wanted to send email from a php script. I was hoping to be able to test it on my local server but I can't quite figure out how to configure it. What happens is that when I run the script, nothing really happens. The script completes without any error messages. I don't get the email, and I don't see any errors in the W3SVC1 log file (under windows\system32\logfiles).

What I have:
Windows XP Pro SP3
IIS 5.1

What I've done:
I did not have the Simple Mail Transfer Protocol (SMTP) service started so I started it.
In IIS, I have the "Default SMTP Virtual Server".
Under "Relay Restrictions" it has "Only the list below", with nothing in the list. The checkbox for "Allow all computers which successfully authenticate to relay, regardless of the list above" is checked.
I basically have not changed any of the default settings.

PHP has SMTP set to localhost, port 25.

None of the directories under c:\inetpub\mailroot have anything in them.

I really don't know what I'm supposed to do. I've been searching the web and reading help files but it's all greek to me.

I don't think there's a problem with my code, but I'm posting it anyways. The constant "EMAIL_ADDR_CCA" is defined to be my own Verizon email address.

I really could use some help/direction on what I need to do to be able to test sending mail from a php script on my localhost.

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<?php
// compose email
$to = EMAIL_ADDR_CCA;
$subject = 'Insurance Information Request';
 
$body = 'The following inquiry has been received:' . '<br />';
 
$body .= $firstname . ' ' . $lastname . '<br />';
$body .= $organization . '<br />';
$body .= $address1 . '<br />';
if (!is_null($address2)) { $body .= $address2 . '<br />'; }
$body .= $city . ', '. $state . ' ' . $postalcode . '<br />';
$body .= $phone1ac . '-' . $phone1ex . '-' . $phone1num . '<br />';
if (!is_null($phone2ac) && !is_null($phone2ex) && !is_null($phone2num)) {
	$body .= $phone2ac . '-' . $phone2ex . '-' . $phone2num . '<br />'; }
$body .= $email . '<br />';
$body .=  '<br />';
$body .= 'Sector: ' . $sector_text;
if ($sector == SECTOR_OTHER) { $body .= ' - ' . $sectorother; }
$body .= '<br />';
$body .= 'Registered 501(c)3? ' . $reg501c . '<br />';
$body .= 'Own/Rent: ' . $ownrent . '<br />';
$body .= 'Annual Revenue: ' . $revenue . '<br />';
$body .= 'Number of Employees: ' . $numemps . '<br />';
$body .= 'Number of Locations: ' . $numlocs . '<br />';
$body .= 'Number of Vehicles: ' .$numvehicles . '<br />';
$body .= '<br />';
 
//send email
mail ($to, $subject, $body);
?>