...
%mail = (
   SMTP => 'localhost',
   from => 'webform@xyz.com',
   to   => "ABCD <$emailAddress>",
   bcc  => 'myaddress\@xyz.com',
   subject => "License Form",
   );

    $boundary = "====" . time() . "====";
...


##</code><code>##

   to   => "XYZ <$emailAddress>",
   bcc  => 'myaddress\@xyz.com, address1\@xyz.com',


##</code><code>##

bcc => "BCC list <myaddress\@xyz.com, address1\@XYZ.com>",