when mail word file it is sent successfuly but when downloaded then it is corrupted. I don't know where is the mistake in the code. Plse check the code:-

email code is as follows
----------------
<?
function send_mail($myname, $myemail, $contactemail, $subject, $message, $attachtype, $type, $topic) {

$fileatt = $_FILES['fileatt']['tmp_name'];
$fileatt_type = $_FILES['fileatt']['type'];
$fileatt_name = $_FILES['fileatt']['name'];

//Finding whether the attachment type is Abstract or Paper
if ($type=="A")
  $stype="Abstract";
elseif ($type=="P")
   $stype="Paper";

//Checking the topic
switch ($topic)
{
case 1:
        $stopic="Optoelectronics(including IR & PV)";
        break;
case 2:
      $stopic="VLSI & ULSI Technologies";
       break;
case 3:
      $stopic="Modelling and Simulation";
      break;
case 4:
      $stopic="Nano-Technology";
      break;
case 5:
      $stopic="High Frequency Devices";
      break;
case 6:
      $stopic="Growth & Characterization";
      break;
case 7:
      $stopic="Sensors & MEMS";
      break;
case 8:
      $stopic="Organic Semiconductors";
      break;
case 9:
      $stopic="Emerging Technoogies";
      break;
}

//Adding the Name and the Email of the Sender in the email Message
$message = "Name:- " . $myname . "\n" . "Email:- " . $myemail . "\n" . "Attachment Type & Version:- " . $attachtype . "\n". "Type:- ". $stype . "\n". "Topic:- " . $stopic . "\n\n" . $message ;

//Giving a unique subject to all the mails.
$today = date("F j, Y, g:i:s a") ;
$subject = $subject ." :- " . $today;

$headers = "From: secretary@iwpsd.net";


if (is_uploaded_file($fileatt)) {

  $file = fopen($fileatt,'rb');
  $data = fread($file,filesize($fileatt));
  fclose($file);


  $semi_rand = md5(time());
  $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";


  $headers .= "\nMIME-Version: 1.0\r\n" .
              "Content-Type: multipart/mixed;\r\n" .
             // "Content-Type: application/msword \n" .
              " boundary=\"{$mime_boundary}\"";

  $message = "This is a multi-part message in MIME format.\r\n\n" .
             "--{$mime_boundary}\r\n" .
             "Content-Type: text/plain; charset=\"iso-8859-1\"\r\n" .
             "Content-Transfer-Encoding: 8bit\r\n\n" .
             $message . "\r\n\n";


  $data = chunk_split(base64_encode($data)); //
    // $data =convert_uuencode($some_string);
//$data = chunk_split($data);



  $message .= "--{$mime_boundary}\r\n" .
              "Content-Type: {$fileatt_type};\r\n" .
              " name=\"{$fileatt_name}\"\r\n" .
              //"Content-Disposition: attachment;\n" .
              //" filename=\"{$fileatt_name}\"\n" .
              "Content-Transfer-Encoding: base64\r\n\n" .
              $data . "\r\n\n" .
              "--{$mime_boundary}--\r\n";
}

$message = StripSlashes($message);



return(mail($contactemail, $subject, $message, $headers));

}// End of the function send-mail

$sendername=$_POST['txtname'];
$senderemail=$_POST['txtemail'];
$sendersubject=$_POST['txtsubject'];
$sendermessage=$_POST['txtmessage'];
$senderattachtype=$_POST['txtatttype'];
$sendertype=$_POST['rdtype']; // Radio Button Showing Abstract or Paper
$sendertopic=$_POST['ddltopic'];
$sendercontactemail="papersubmission.iwpsd@gmail.c om";

if (send_mail($sendername, $senderemail, $sendercontactemail, $sendersubject, $sendermessage,$senderattachtype,$sendertype,$send ertopic)) {
  print "SENT!";
} else {
  print "FAILED!";
}

?>
----------------

I had a similar problem once, it turned out there was a single space inserted at the beginning of a file. To troubleshoot your problem I suggest using the technique that I did then, open the non-corrupted file in Wordpad or Notepad, and do the same with the corrupted file. Compare the two side-by-side and see what the difference is.

Regards,
Rich

--
[http://www.smilingsouls.net]
Mail_IMAP: A PHP/C-Client/PEAR solution for webmail
Author: Beginning CSS: Cascading Style Sheets For Web Design