error at registering new user!!!

[slemo]

Hi! I saw somewhere on the forum this problem but i can't find it again, so my problem is next--->

When someone want to register on my online store they got this 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:\wamp\www\oscommerce\catalog\includes\classes\email.php on line 502

 

Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\oscommerce\catalog\includes\classes\email.php:502) in c:\wamp\www\oscommerce\catalog\includes\functions\general.php on line 29

 

In my php.ini i change email adress to my own. Do i need a mail server to work this properly?

 

Thanks for any advice!!!