PHP pomoc Plizzzzzzzzz!

[mung...@yahoo.com]

Na svojoj web stranici imam feedback obrazac koji mi neki
likovi stalno koriste za slanje spamova. Pošto sam totalna
neznalica glede PHP-a nemam ideju na koji nacin to izvode,
tako da svaki pokušaj blokiranja istih je odmah u startu propao.
Mailovi koji mi svakodnevno stižu su oblika:

sport3...@myweb.com
sdgav...@myweb.com
kjgkasd...@myweb.com, etc...

U prilogu posta šaljem i kompletnu skriptu, naravno s nešto
izmijenjenim varijablama.

Jel mi može netko pomoci riješiti ovaj problem, plizzzzzzz,
molim......
THX !

************************
PHP SCRIPTA:

<?php

$myemail = "mym...@myweb.com"

if(!$visitormail == "" && (!strstr($visitormail,"@") ||
!strstr($visitormail,".")))
{
echo "<h2>Use Back - Enter valid e-mail</h2>\n";
$badinput = "<h2>Feedback was NOT submitted</h2>\n";

}

if(empty($visitor) || empty($visitormail) || empty($notes )) {
echo "<h2>Use Back - fill in all fields</h2>\n";

}

echo $badinput;

$todayis = date("l, F j, Y") ;

$attn = $attn . "(" . $ccopy . ")" ;
$subject = $attn;

$notes = stripcslashes($notes);

$message = " $todayis [EST] \n
Subject: $attn \n
Message: $notes \n
From: $visitor ($visitormail)\n
Additional Info : IP = $ip \n
Browser Info: $httpagent \n
Referral : $httpref \n
";

$from = "From: $visitormail\r\n";

if ($myemail != "")
mail($myemail, $subject, $message, $from);

if (($ccopy == "ccyes") && ($visitormail != ""))
mail($visitormail, $subject, $message, $from);
?>