All emails sent in same request are affected

Mollom alters all emails if any mollom_response info was generated in the request. This makes password recovery, new registration, etc. emails to include the "Report as inappropriate: ..." footer, which is quite misleading.

/**
 * This function adds a 'report as inappropriate' link to the e-mails that are sent
 * by the contact module.
 */ 
function mollom_mail_alter($key, $to, $subject, &$body, $from, $headers) {
  $response = $GLOBALS['mollom_response'];
  if (isset($response) && isset($response['session_id'])) {
    $body .= "\n\n". t('Report as inappropriate: @link', array('@link' => url('mollom/contact/'. $response['session_id'], NULL, NULL, TRUE)));
  }
}

The comment says, this is about to affect only contact emails, so mollom should filter $key to the contact emails as far as I see. Or if more emails are to be affected (eg. those sent by webform module), we need some way to control the mail keys to look at.