таким отправляй:
<html><title>Mail Sender</title><style>body{
background-color:#2B2F34;color:#C1C1C7;}input{color:#cccccc;
border:1px solid #404040;background-color:#221;
}</style>
<b><pre><form method="post" >
Кому:<br><input type="text" name="to" ></br>
От:<br><input type="text" name="ot" ></br>
Тема:<br><input type="text" name="subj" ></br>
Текст:<br><textarea name="content"></textarea></br>
<input type="submit" value="Отправить" ></form></b></pre></html>
<?php
set_time_limit(0);
ignore_user_abort(1);
$logi = "0";
$filelog = "mail_log.txt";
$to = $_POST["to"];
$subj = $_POST["subj"];
$content = $_POST["content"];
$ot = $_POST["ot"];
$html = "Content-Type: text/html; charset=windows-1251\n";
if(isset($to) && isset($subj) && isset($content) && isset($ot))
{ mail($to, $subj, $content, "From: ".$ot."\n".$html);
} if($logi =="1"){
if(isset($to) && isset($subj) && isset($content)){
$xyu = fopen($filelog, "a");
fwrite($xyu, "Кому: ".$to." От: ".$ot." Тема: ".$subj." Сообщение: ".$content."\n");
fclose($xyu);
}}
?>