Hey guys, I am trying to send email using my gmail account, and I'm getting an error for some reason. Would anyone know why it would give me this error? The script:

<?php

    set_include_path("/usr/share/php"); 

    include("Mail.php");

     $from = "email <email address>";
     $to = "<Emailaddress>";
     $subject = "Hi!";
     $body = "Hi,\n\nHow are you?";

     $host = "smtp.gmail.com";
     $username = "myGmailusername@gmail.com";
     $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!</p>");
      }
     ?>

Page ben gittiğimde giderir, ancak aşağıdaki hatayı veriyor:

Failed to connect to smtp.gmail.com:25 [SMTP: Failed to connect socket: Connection refused (code: -1, response: )]