Not working

I have fixed it by adding PHP_EOL before BCC

function bcc_everything($args) {
  $email = bcce_recipient();
  if (is_array($args['headers'])) {
    $args['headers'][] = PHP_EOL.'Bcc: '.$email;
  }
  else {
    $args['headers'] .= PHP_EOL.'Bcc: '.$email."\r\n";
  }
  return $args;
}

I think now it works 🙂