Nelze odeslat email pokud je v textu dvojtečka :

<? 

// ------------------ CZ MAIL --------------------- 
$firma3 = $_GET["firma3"];
$osoba3 = $_GET["osoba3"];
$adresa3 = $_GET["adresa3"]; 
$telefon3 = $_GET["telefon3"];
$email3 = $_GET["email3"];
$adresat="info@pokus.cz"; // Mail 
$subject="Z www.pokus.cz píše p.".$osoba3; 
$odeslat="Uzivatel z WWW stránek: 
------------------------------------------
Firma: ".$firma3."
Kontaktní osoba: ".$osoba3."
Adresa: ".$adresa3."
Telefon: ".$telefon3."
E-mail: ".$email3."
------------------------------------------
Popis: ".$text3."

"; 

function CZMail($to, $subj, $text, $headers = "") 
{
// prevedení z windows-1250 do iso-8859-2 (pokud je potreba) 
$text = StrTr($text, 
"\x8A\x8D\x8E\x9A\x9D\x9E", 
"\xA9\xAB\xAE\xB9\xBB\xBE");   
// prekódování do Base64 
$text = Base64_Encode($text); 
// pridání hlavicek 
$headers = "MIME-Version: 1.0\n". 
"Content-Type: text/plain; charset=\"iso-8859-2\"\n". 
"Content-Transfer-Encoding: base64\n"; 
// odeslání e-mailu 
Mail($to, $subj, $text, $headers); 
} 

CZMail($adresat, $subject, $odeslat, ''); 

?>

<?php
$mail = "technik@essv.cz";
$predmet = "POPTAVKA z www.nejpoptavky.cz";
$zprava = "Firma: {$_GET['firma0']}\r\n";
$zprava .= "Osoba: {$_GET['osoba0']}\r\n";
$zprava .= "Adresa: {$_GET['adresa0']}\r\n";
$zprava .= "Telefon: {$_GET['telefon0']}\r\n";
$zprava .= "E-mail: {$_GET['email0']}\r\n";
$zprava .= "Příloha: {$_GET['priloha0']}\r\n";
$zprava .= "Datum vložení: {$_GET['data0']}\r\n";
$zprava .= "Popis poptávky: {$_GET['text0']}\r\n";

$kon = cs_mail ($mail, $predmet, $zprava, "Z: vas@web.cz\n");

if ($kon)
  echo "E-mail byl úspěšně odeslán.<br>";
 else
  echo "E-mail se bohužel nepodařilo odeslat.<br>";

function autoUTF($s)
{
    // detect UTF-8
    if (preg_match('#[\x80-\x{1FF}\x{2000}-\x{3FFF}]#u', $s))
        return $s;
    // detect WINDOWS-1250
    if (preg_match('#[\x7F-\x9F\xBC]#', $s))
        return iconv('WINDOWS-1250', 'UTF-8', $s);
    // assume ISO-8859-2
    return iconv('ISO-8859-2', 'UTF-8', $s);
}

function cs_mail ($to, $predmet, $zprava, $head = "")
       {  $predmet = "=?utf-8?B?".base64_encode(autoUTF ($predmet))."?=";
          $head .= "MIME-Version: 1.0\n";
          $head .= "Content-Type: text/plain; charset=\"utf-8\"\n";
          $head .= "Content-Transfer-Encoding: base64\n";
          $zprava = base64_encode (autoUTF ($zprava));
          return mail ($to, $predmet, $zprava, $head); }

_root.loadVariables("mail15.php?firma0="+_root.firma0+"&osoba0="+_root.osoba0+"&adresa0="+_root.adresa0+"&telefon0="+_root.telefon0+"&email0="+_root.email0+"&priloha0="+_root.priloha0+"&data0="+_root.data0+"&text0="+_root.text0,POST);

<?php

$file="99.txt";
$kolik_zobraz = 1000;
$data=date("d-m-Y");

$fp = fopen($file, "a+");
$lines = file($file);

$body = explode("\n", $fp);
$all_count = count($lines);

if ($all_count < $kolik_zobraz) 
{ $kolik_zobraz = $all_count; }

if (isset($action) && $action == "ddd")
{
$firma = str_replace ("&", " ", $firma0);
$osoba = str_replace ("&", " ", $osoba0);
$adresa = str_replace ("&", " ", $adresa0);
$telefon = str_replace ("&", " ", $telefon0);
$email = str_replace ("&", " ", $email0);
$priloha = str_replace ("&", " ", $priloha0);
$text = str_replace ("&", " ", $text0);
$charset = 'windows-1250';
if (file_exists($file))	{
	$ll = $all_count + 1;
	fwrite($fp,"lp$ll=$ll&firma2$ll=$firma&osoba2$ll=$osoba&adresa2$ll=$adresa&telefon2$ll=$telefon&email2$ll=$email&priloha2$ll=$priloha&data$ll=$data&text$ll=$text\n");
	}
}

if (isset($action) && $action == "kuk")
{
	if (file_exists($file))	{

	echo "&all=$kolik_zobraz";
	for($i = $all_count; $i >= ($all_count-$kolik_zobraz) ;$i--){
		echo $lines[$i]."&"; }
        echo "pocet=$all_count";
	
							}
}

fclose($fp);

?>