$config['mailtype'] = 'html';
               $config['charset']  = 'utf-8';
               $config['priority'] = 1;
               $config['protocol'] = 'smtp';
               $config['smtp_host'] = 'smtp.mandrillapp.com';
               $config['smtp_port'] = '587';
               $config['smtp_user'] = 'abcdefgh@gmail.com';
               $config['smtp_pass'] = 'xxxxxxxxxxxxxxxxxxxxxx';