Configure php.ini for mail settings

Hello,
I am sorry about this question as it probably is simple i just need to make sure im doing things right. I have a php script for my forms and it appears to work but it doesn't send the email to the email address. I am now turning to the php.ini as i forgot to set it but im not sure if i have done it right:-
Code:
[mail function]
; For Win32 only.
SMTP = authsmtp.streamline.net
smtp_port = 25
; For Win32 only.
;sendmail_from = [email protected]
I am running windows xp. Do i need to change any of the above. And also when i edit it, do i have to upload it to my web server?
Can anyone please help, many thanks

Who is your mail provider? What did they give you as outgoing mail server? That's what you need to put for the smtp option. smtp_port is very likely to be right. You should uncomment the sendmail_from option to get a proper sender address, too.

Also, do you need to login to the SMTP server? If so, you'll probably have to tell PHP your authentication info, too. I don't know how to do that, though.