<?
$to = "[email protected]";
$subject = "ZDNet Developer article";
$msg = "I completely understand SMTP servers now!";
$headers = "From: [email protected] Reply-To: [email protected]";
mail("$to", "$subject", "$msg", "$headers");
echo "finished!";
?>

注意：
$to 、$subject 、$msg几个参数的内容都可以任意修改。
$headers 不能修改，否则发送不成功！