// subject
$subject  = "Hello There ";

$mime_boundary = "<<<--==-->>>";

       // headers
       $headers  = "From: " . 'Tom' . " <" . 'texample@aol.com' . ">\r\n";
$headers .= "Return-Path: " . 'texample@aol.com' . "\r\n";
$headers .= "Reply-To: " . 'texample@aol.com' . "\r\n";
$headers .= "Content-type: Multipart/Mixed;\r\n";
$headers .= "Mime-Version: 1.0\r\n";
$headers .= "X-Mailer: PHP Mailer\r\n";
$headers .= " boundary=\"".$mime_boundary."\"";

// message
$message .= "This is a multi-part message in MIME format.\r\n";
$message .= "\r\n";
$message .= $mime_boundary."\r\n";

$message .= "Content-Type: text/plain; charset=\"iso-8859-1\"\r\n";
$message .= "Content-Transfer-Encoding: 7bit\r\n";
$message .= "\r\n";
$message  = "Attached is the file ";
$message .= ".";
$message .= "\n\n";
$message .= $mime_boundary."\r\n";

$message .= "Content-Type: text/plain; charset=\"iso-8859-1\"\r\n";
$message .= " name=\"feedback.txt\"\r\n";
$message .= "Content-Description: Requested File;\r\n";
$message .= " filename=\"feedback.txt\"\r\n";
$message .= "\r\n";
$message .= $mime_boundary."\r\n";

       $email = "dianne@aol.com";

// Send
if (mail ($email, $subject, $message, $headers)) {
   echo "<script>alert ('Your email was sent. ')</script>";
   }
else {  
   echo "<script>alert ('Unable to send your email.')</script>";
}