Aliciamee,
For help with apache2triad you'll need to go to http://apache2triad.net/forums/
I've just quickly read the apache2triad web page and it looks like a wamp install, so i'm guessing your localy developing and testing PHP scripts on your home PC, and using apache to serve them back through your browser.
This is all well and good, but to send email you really must send to an SMTP server. We cannot help you set this up, nor can we explain how it works beacuse it's beyond the scope of PHP.
One thing i will say though, look at your Email program.. Outlook, Thunderbird or what ever it is you use on your PC. Your Internet provider will have configured an SMTP server that allows you to send mail using their own network.
Once you know how to set that up, then put the details of the SMTP connection into the appropriate places in your PHP.INI file and the PHP Mail function will then work.
If all you have is Internet connection, and have to use something like yahoo or hotmail to send email then your stone cold out of luck i'm afraid, because you simply will not be able to send email from your local PC without access to an SMTP server.
Cheers
Shawty