send email php code

<?php


$name=$_POST['username'];
$femail=$_POST['useremail'];
$fpass=$_POST['password'];
$phone=$_POST['usermobile'];
$fmsg=$_POST['usermessage'];



$to = "xyz@gmail.com";

$subject .= "This is subject";

$message = "User name=$name<BR/>
<br/>
User email=$femail<br/>
<br/>
User contact=$phone<br/>
<br/>
User message=$fmsg";
$header .= "From: abc@gmail.com\r\n";

$header .= "MIME-Version: 1.0\r\n";
$header .= "Content-type: text/html\r\n";

$retval = mail ($to,$subject,$message,$header);

if( $retval == true )
{
echo "Message sent successfully...";
header("Location: # ");
}
else
{
echo "Message could not be sent...";
}


?>