...
 for my $email (@mail) {

   my $attached = ($code) ? "attach_path => '$file_name',attach_filename => '$file_name',attach_type => 'application/txt'," : '';

   my $success = email( {
			 to              => $email,
			 from            => $from,
			 from_name       => $name,
			 subject         => $subject,
			 body            => $body,
			 $attached
			} );

  }
  ...