SMTP error?

[Perad]

I'm using my laptop as a web server. After i registered on my site i got the following error

 

 

Warning: 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() in C:\webs\test\Store\catalog\includes\classes\email.php on line 522

 

Warning: Cannot modify header information - headers already sent by (output started at C:\webs\test\Store\catalog\includes\classes\email.php:522) in C:\webs\test\Store\catalog\includes\functions\general.php on line 33

 

 

My webserver has php5, mysql and can run applications such as phpbb forums on it.

 

I have checked my smtp_port and it is set to 25.

 

Is there anything else i need to install for this to work?