Email

Hi sorry to be a pain, I have looked all over the php site, all over apache and all over the Sql site and still I have not found any answers. I have installed and running on my computer a server to run a forum. Apache installed and working MySql installed and working Php installed and working phpBB installed and working, but within the forum there is function to send email out, do I need to install another email server or is there some commands I can add to the php.ini to use my ISP's server. My ISP email server requires a username and password (Outlook) I have also read I might need "sendmail" Any thoughts would be appreciated. I am running it all on Windows 98SE, php scripts are working just fine, uploads are working fine, but no email function works. smtp=smtp.ntlworld.com wont work no user name and password ? Thank you John