First Email

[eluser]akkumaru[/eluser]
This is my first time trying to send email with PHP & CI,,
An error (to be predicted) is occured:

A PHP Error was encountered

Severity: Warning

Message: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set()

Filename: libraries/Email.php

Line Number: 1444

What things SHOULD i prepare & configure before sending emails?
Currently I use the Apache Web Server (bundled in XAMPP) running on WinXp