title: PHP mail() attachment not opening in Mac mail
body: <p>I am sending an email using PHP mail() and I can successfully receive and open the attachment (in this case a pdf) in almost every program i have access to. Except in mac mail where I am told that the file is corrupt. Has anyone else run into this problem before?
  Below is the script I am using:</p>
  
  <pre><code>//define the receiver of the email
  $to = 'bionic.comms@hotmail.com';
  //define the subject of the email
  $subject = 'Email with Attachment';
  //create a boundary string. It must be unique
  //so we use the MD5 algorithm to generate a random hash
  $random_hash = md5(date('r', time()));
  //define the headers we want passed. Note that they are separated with \n
  $mime_boundary = "&lt;&lt;&lt;--==+X[".md5(time())."]";
  
  $path = $_SERVER['DOCUMENT_ROOT'].'/two/php/';
  $fileContent =  chunk_split(base64_encode(file_get_contents($path.'CTF_brochure.pdf')));
  
  
  $headers .= "From: info@poundsandpennies.org.uk &lt;info@poundsandpennies.org.uk&gt;"."\n";
  
      $headers .= "MIME-Version: 1.0\n" .
              "Content-Type: multipart/mixed;\n" .
              " boundary=\"{$mime_boundary}\"";   
  
  $message = "This is a multi-part message in MIME format.\n";
  
  $message .= "\n";
  $message .= "--".$mime_boundary."\n";
  
  $message .= "Content-Type: text/plain; charset=\"iso-8859-1\"\n";
  $message .= "Content-Transfer-Encoding: base64\n";
  $message .= "\n";
  $message .= "Email content and what not: \n";
  $message .= "This is the file you asked for! \n";
  $message .= "--".$mime_boundary."" . "\n";
  
  $message .= "Content-Type: application/octet-stream;\n";
  $message .= " name=\"CTF-brochure.pdf\"" . "\n";
  $message .= "Content-Transfer-Encoding: base64 \n";
  $message .= "Content-Disposition: attachment;\n";
  $message .= " filename=\"CTF_brochure.pdf\"\n";
  $message .= "\n";
  $message .= $fileContent;
  $message .= "\n";
  $message .= "--".$mime_boundary."--\n";
  
  //send the email
  $mail_sent = mail($to, $subject, $message, $headers);
  //if the message is sent successfully print "Mail sent". Otherwise print "Mail failed"
  echo $mail_sent ? "Mail sent" : "Mail failed";
  </code></pre>
  
  <p>Thanks in advance!</p>