Need help with error in php code

[akacj]

Hi, this is my logon/register script and recieved an error.

Instead of users logging in with an email adrress , I let them choose any logon id they want. i modded the script and put a LOGON_ID textbox and changed the script a little. Now there is an error. It is not sending an activation email. If i register i can logon with my own logon id, but i have to manually activate the account. It simply wont send the email.

Heres Register.php

<?php
# Script 16.6 - register.php
// This is the registration page for the site.

require_once ('includes/config.inc.php');
$page_title = 'Register';
include ('includes/header.html');

if (isset($_POST['submitted'])) { // Handle the form.

require_once (MYSQL);

// Trim all the incoming data:
$trimmed = array_map('trim', $_POST);

// Assume invalid values:
$fn = $ln = $e = $lid = $p = FALSE;

// Check for a first name:
if (preg_match ('/^[A-Z \'.-]{2,20}$/i', $trimmed['first_name'])) {
	$fn = mysqli_real_escape_string ($dbc, $trimmed['first_name']);
} else {
	echo '<p class="error">Please enter your first name!</p>';
}

// Check for a last name:
if (preg_match ('/^[A-Z \'.-]{2,40}$/i', $trimmed['last_name'])) {
	$ln = mysqli_real_escape_string ($dbc, $trimmed['last_name']);
} else {
	echo '<p class="error">Please enter your last name!</p>';
}

// Check for an email address:
if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $trimmed['email'])) {
	$e = mysqli_real_escape_string ($dbc, $trimmed['email']);
} else {
	echo '<p class="error">Please enter a valid email address!</p>';
}

// Check for a logon id:
if (preg_match ('/^[A-Z \'.-]{2,20}$/i', $trimmed['logon_id'])) {
	$lid = mysqli_real_escape_string ($dbc, $trimmed['logon_id']);
} else {
	echo '<p class="error">Please enter a preferred logon id!</p>';
}


// Check for a password and match against the confirmed password:
if (preg_match ('/^\w{4,20}$/', $trimmed['password1']) ) {
	if ($trimmed['password1'] == $trimmed['password2']) {
		$p = mysqli_real_escape_string ($dbc, $trimmed['password1']);
	} else {
		echo '<p class="error">Your password did not match the confirmed password!</p>';
	}
} else {
	echo '<p class="error">Please enter a valid password!</p>';
}

if ($fn && $ln && $e && $lid && $p) { // If everything's OK...

	// Make sure the logon id is available:
	$q = "SELECT user_id FROM users WHERE logon_id='$lid'";
	$r = mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc));

	if (mysqli_num_rows($r) == 0) { // Available.

		// Create the activation code:
		$a = md5(uniqid(rand(), true));

		// Add the user to the database:
		$q = "INSERT INTO users (email, logon_id, pass, first_name, last_name, active, registration_date) VALUES ('$e', '$lid', SHA1('$p'), '$fn', '$ln', '$a', NOW() )";
		$r = mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc));

		if (mysqli_affected_rows($dbc) == 1) { // If it ran OK.

			// Send the email:
			$body = "Thank you for registering at <CBJ NETWORKS>. To activate your account, please click on this link:\n\n";
			$body .= BASE_URL . 'activate.php?x=' . urlencode($e) . "&y=$a";
			mail($trimmed['email'], 'Registration Confirmation', $body, 'From: [e-mail]');

			// Finish the page:
			echo '<h3>Thank you for registering! A confirmation email has been sent to your address. Please click on the link in that email in order to activate your account.</h3>';
			include ('includes/footer.html'); // Include the HTML footer.
			exit(); // Stop the page.

		} else { // If it did not run OK.
			echo '<p class="error">You could not be registered due to a system error. We apologize for any inconvenience.</p>';
		}

	} else { // The email address is not available.
		echo '<p class="error">That email address has already been registered. If you have forgotten your password, use the link at right to have your password sent to you.</p>';
	}

} else { // If one of the data tests failed.
	echo '<p class="error">Please re-enter your passwords and try again.</p>';
}

mysqli_close($dbc);

} // End of the main Submit conditional.
?>

<h1>Register</h1>
<form action="register.php" method="post">
	<fieldset>

<p><b>First Name:</b> <input type="text" name="first_name" size="20" maxlength="20" value="<?php if (isset($trimmed['first_name'])) echo $trimmed['first_name']; ?>" /></p>

<p><b>Last Name:</b> <input type="text" name="last_name" size="20" maxlength="40" value="<?php if (isset($trimmed['last_name'])) echo $trimmed['last_name']; ?>" /></p>

<p><b>Email Address:</b> 
<input type="text" name="email" size="30" maxlength="80" value="<?php if (isset($trimmed['email'])) echo $trimmed['email']; ?>" /></p>

<p><b>LOGON ID:</b> <input type="text" name="logon_id" size="20" maxlength="20" value="<?php if (isset($trimmed['logon_id'])) echo $trimmed['logon_id']; ?>" /></p>


 <p><b>Password:</b> 
  <input type="password" name="password1" size="20" maxlength="20" /> 
  <small>Use only letters, numbers, and the underscore. Must be between 4 and 20 characters long.</small></p>
<p><b>Confirm Password:</b> <input type="password" name="password2" size="20" maxlength="20" /></p>
</fieldset>

<div align="center"><input type="submit" name="submit" value="Register" /></div>
<input type="hidden" name="submitted" value="TRUE" />

</form>


<?php // Include the HTML footer.
include ('includes/footer.html'); ?>

Here the error email it sent to me.:

<p>An error occurred in script 'C:\inetpub\wwwroot\auth\register.php' on line 79: mail(): SMTP server response: 550 5.7.1 Unable to relay
<br />Date/Time: 10-28-2011 02:54:21
<br /><pre>Array
(
    [GLOBALS] => Array
 *RECURSION*
    [_POST] => Array
        (
            [first_name] => test
            [last_name] => test
            [email] => [e-mail]
            [logon_id] => test
            [password1] => test
            [password2] => test
            [submit] => Register
            [submitted] => TRUE
        )

[_GET] => Array
    (
    )

[_COOKIE] => Array
    (
        [PHPSESSID] => koqkb5t6gno5m10viejmil8m14
        [PBack] => 0
        [sessionid] => 1fd019cf-7597-42a8-a5a9-b852f3ac0255
        [cadata] => "0PCJztaQvSAgLbNwdJUaYYxoTvR 0O1m4K5SubHL83rDxlmUyxDfwO/E0IJmSIsTiHtmk7Gg9uMUaZlmasDEj8F/uEz7p 8gziIOl4w=="
        [UserContext] => c8a338c07ebb4433a8cd71cc631c1774
    )

[_FILES] => Array
    (
    )

[page_title] => Register
[_SESSION] => Array
    (
    )

[dbc] => mysqli Object
    (
        [affected_rows] => 1
        [client_info] => mysqlnd 5.0.8-dev - 20102224 - $Revision: 310735 $
        [client_version] => 50008
        [connect_errno] => 0
        [connect_error] => 
        [errno] => 0
        [error] => 
        [field_count] => 0
        [host_info] => localhost via TCP/IP
        [info] => 
        [insert_id] => 19
        [server_info] => 5.1.57-community
        [server_version] => 50157
        [sqlstate] => 00000
        [protocol_version] => 10
        [thread_id] => 193
        [warning_count] => 0
    )

[trimmed] => Array
    (
        [first_name] => test
        [last_name] => test
        [email] => [e-mail]
        [logon_id] => test
        [password1] => test
        [password2] => test
        [submit] => Register
        [submitted] => TRUE
    )

[p] => test
[lid] => test
[e] => [e-mail]
[ln] => test
[fn] => test
[q] => INSERT INTO users (email, logon_id, pass, first_name, last_name, active, registration_date) VALUES ('[e-mail]', 'test', SHA1('test'), 'test', 'test', '680bb1fdeaea7a4d573ddc2d9c019375', NOW() )
[r] => 1
[a] => 680bb1fdeaea7a4d573ddc2d9c019375
[body] => Thank you for registering at <CBJ NETWORKS>. To activate your account, please click on this link:

http://192.168.1.2/activate.php?x=cjjohnson73%40yahoo.com&y=680bb1fdeaea7a4d573ddc2d9c019375
)
</pre>
</p>

[dalecosp]

You mail server isn't configured to allow relay from wherever/whomever this script is being run from/by.

[akacj]

How do I do that?. everything worked fine before the change.