Help me sending mail in php

I am using Windows XP SP2

Code is like this :
<?php
if ($_SERVER['REQUEST_METHOD'] == "POST")
{
$txtname = strip_tags($txtname);
$txtid = strip_tags($txtid);
$txtfb = strip_tags($txtfb);



$sendto = "mooels@yahoo.com";
$subject = "Simple";
$message = "$txtname, $txtid, $txtfb";

mail($sendto, $subject, $message);
echo "Your feedback is sent";
}
?>

while running error will be displayed like this:

"Warning: mail() [function.mail]: SMTP server response: 550 5.7.1 Unable to relay for mooels@yahoo.com in C:\www\WDC\wd-guide\send.php on line 14"

 

Are you using php on Windows?

Is it a Production server or a Test & Development server?

 

As Kuldeep1952 said, your code won't work on a local server, but would perfectly work on a server.

 

Sure for having php works professionally it really needs a linux server test it there online

 

is it working yet? or do you still need help?

 

i need one that can host mailier for me on php. please kindly tell me ur price.

 

i am hosted at www.godaddy.com, sorry for advertising, but their prices are very cheap, and of course i can send mails