configure smtp error

I am using LAN in my college and there is firewall. will it effect my mail function in php. I configure my server name as localhost at apache http.conf. and inphp.ini i configure my SMTP like this: [mail function] ; For Win32 only. SMTP= POP ; for Win32 only ; For Win32 only. sendmail_from= merry_e_k@hotmail.com ; for Win32 only but i got warning: mail(): Failed to connect to mailserver at "POP" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in c:\program files\apache group\apache\htdocs\do_feedback.php on line 12