Help with email - I'm new to CI

[eluser]ChaosKnight[/eluser]
I am upgrading an existing PHP website to CodeIgniter, the host unfortunately only has Windows servers running IIS, but on the previous pages I have managed to send the email from the Contact page quite fast. The mail server only requires normal SMTP authentication, and only allow the outgoing SMTP protocol.

Here is the email.php file located at application/config:

Code:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
  $config['protocol']='smtp';
  $config['smtp_host']='[host]';
  $config['smtp_user']='[user]';
  $config['smtp_pass']='[pass]';
/* End of Email.php config file */

Once again I have left out the real details, as this is very confidential.

Is there additional settings that I have left out?
The host uses the default port.