PHP mail() function

if(!empty($result))
{
$to="someone@domain.com";;
$subject="Your confirmation link here";
$message="Your Comfirmation link";
$message.=" Click on this link to activate your account ";
$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

$sentmail = mail($to,$subject,$message,$headers);
}
else
 {
echo "Email Address Is Not In Database!";
}
if($sentmail)
{
echo "Your Confirmation link Has Been Sent To Your Email Address.";
}
else
 {
echo "Error! Cannot send Confirmation link ";
}