I'm trying to send an email with a single attachment, and having issues.

I've gone through all the posts on there regarding the subject, and have been unable to make anything work.

my code so far:

PHP Code:
  // Generate a boundary string 
$mime_boundary md5(uniqid(time()));

// Add the headers for a file attachment 
$headers .= "\nMIME-Version: 1.0\n" 
"Content-Type: multipart/mixed;\n" 
" boundary=\"{$mime_boundary}\""

// Add a multipart boundary above the plain message 
$message "This is a multi-part message in MIME format.\n\n" 
"Content-Type: text/plain; charset=\"iso-8859-1\"\n" 
"Content-Transfer-Encoding: 7bit\n\n" 
$message "\n\n";

$message .= "--{$mime_boundary}\n" 
"Content-Type: application/pdf;\n" 
" name=\"20070730121144.pdf\"\n" 
"Content-Disposition: attachment;\n" 
" filename=\"20070730121144.pdf\"\n" 
"Content-Transfer-Encoding: base64\n\n\n\n" 

// Send the message 

I can see the attachment in the email, but it comes up 0 kb.

any ideas?

thanks in advance for your time!