Are you going to be sending email in PHP? Don't use the mail() function, unless your site's email needs are very basic and you are running on a Linux/Unix machine. It is light on features and not built in to the Windows version.

The best approach is to use a 3rd party mail program. In the past I have used PHPMailer and I love it. I make many posts with this solution to SMTP email problems in PHP and this is the fix!

http://sourceforge.net/projects/phpmailer

Below is the PHP code to use it. Place class.phpmailer.php into your php includes directory.

Replace text in << >> with your server information: http://www.emailaddressmanager.com/tips/mail-settings.html
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<?php
 
require("class.phpmailer.php");
 
$mail = new PHPMailer();
 
$mail->IsSMTP(); // send via SMTP
$mail->Host     = "<<smtpserver>>:<<stmpport>>"; // SMTP servers
$mail->SMTPAuth = true; // turn on SMTP authentication
$mail->Username = "<<uname>>"; // SMTP username
$mail->Password = "<<pword>>"; // SMTP password
$mail->From = "<<email address from>>";
$mail->FromName = "<<email name from>>";
$mail->AddAddress("<<email address to>>"); 
$mail->AddReplyTo("<<email address from>>","<<email name from>>");
$mail->WordWrap = 50; // set word wrap
$mail->IsHTML(true); // send as HTML
$mail->Subject  =  "Subject";
$mail->Body     =  "Body text";
$mail->AltBody  =  $mail->Body;
        
$mail->Send();
 
?>