PHP Mail / PHP.ini

Hello, I have recently installed PHP 4 (c:\PHP) with Apache. I have successfully run multiple PHP scripts with some quite complex code. Except for MAIL! Upon installing PHP I had 3 PHP.? files with a search for 'php.ini': c:\PHP\pear\tests\php - with 2 line content: ; php.ini for PEAR tests include_path=.. and two much more comprehensive files located at: c:\PHP\php.ini-dist c:\PHP\php.ini-recommended When trying to configure the ini file to accomodate email, I rightly or wrongly edited the 'php.ini-recommended' file to my SMTP entry to: [mail function] ; For Win32 only. SMTP = xxx.xxx.xxx.xxx (where xxx is my valid mail server IP) I saved this and also saved it as php.ini in c:\PHP (again, rightly or wrongly). With the PHP code - mail($address, $subject, $message); - where the 3 variables ARE valid, the mail is NOT sent and I am given the warning: Warning: Unknown error in c:\program files\apache group\apache\htdocs\req\reqprocess.php on line 24 where line 24 is the line quoted above - mail($address, $subject, $message); Can anyone offer me information on firslty if I have blundered blindly into the .ini configuration, and a possible resolution of my broken email? Many thanks Paul.