Code:
<form action="email.php" method="post">
   I<font color="#000000">Ime:&nbsp;&nbsp;&nbsp; </font>
    <p><font color="#000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </font> <input type="text" name="ime" /><font color="#000000"> </font></p>
    <p><font color="#000000">E-mail: </font></p>
    <p><font color="#000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </font> <input type="text" name="naslov" size="27" /><font color="#000000">
    </font></p>
    <p><font color="#000000">Sadrzaj </font></p>
    <p><font color="#000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <textarea name="sadrzaj" rows="10" cols="21"></textarea>
       </font>&nbsp;<input type="submit" value="Posalji" /> <input type="reset" value="Resetuj" />
    </p>
</form>

Code:
<?php




// Receiving variables
@$pfw_ip= $_SERVER['REMOTE_ADDR'];
@$ime = addslashes($_POST['ime']);
@$naslov = addslashes($_POST['naslov']);
@$sadrzaj = addslashes($_POST['sadrzaj']);

// Validation
if (! ereg('[A-Za-z0-9_-]+\@[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+', $naslov))
{
header("Location: indexneuspesno.htm");
exit;
}

if (strlen($naslov) == 0 )
{
header("Location: indexneuspesno.htm");
exit;
}

//Sending Email to form owner
$pfw_header = "From: $naslov\n"
  . "Reply-To: $naslov\n";
$pfw_subject = "Astrodus";
$pfw_email_to = "[email protected]";
$pfw_message = "Visitor's IP: $pfw_ip\n"
. "ime: $ime\n"
. "naslov: $naslov\n"
. "sadrzaj: $sadrzaj\n"

. @mail($pfw_email_to, $pfw_subject ,$pfw_message ,$pfw_header ) ;


header("Location: indexuspesno.htm");

?>