Wikimedia Bugzilla is closed!

I have mediawiki installed on an ubuntu system w/php, apache and pear-php.  I have congirued mediawiki to use the smtp feature of pear mail. Example configuration code:

$wgSMTP = array(
 'host'     => "smtp.myisp.net",
 'IDhost'   => "earthlink.net",
 'port'     => 25,
 'auth'     => true,
 'username' => "my_isp_username",
 'password' => "my_isp_password"
);


The method works.  However when a users goes to the preferences page and sends a test e-mail (with the confirmation code), the following message is returned:

Could not send confirmation mail. Check address for invalid characters.
Mailer returned: 1

Actually, the mail was sent and everything is OK.  I have tried this with several smtp servers.  My work around was to find the source of the message and change it.  The message is in the languages/messages directory in the file:  MessagesEn.php.  I changed the message to read:

"Your email has probably been sent.  This server can not confirm email transmission.  Please wait a few minutes and check your e-mail account."  

When I tested pear mail with a php script it appeared to report back the correct message.  So I think pear is working right.  I used the code below to test pear.

<?php
require_once "Mail.php";

$from = "Support <support@xxxx.com>";
$to = "User <user@xxxx.com>";
$subject = "Pear Test";
$body = "Testing Pear";

$host = "smtpout.xxx.com";
$port = "25";
$username = "xxxx";
$password = "xxxx";

$headers = array ('From' => $from,
  'To' => $to,
  'Subject' => $subject);
$smtp = Mail::factory('smtp',
  array ('host' => $host,
    'port' => $port,
    '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!</p>");
 }
?>