docs: def set_relay_ip_list(addresses=None, server=_DEFAULT_SERVER):
      '''
      Set the RelayIpList list for the SMTP virtual server.
  
      Due to the unusual way that Windows stores the relay IPs, it is advisable to retrieve
      the existing list you wish to set from a pre-configured server.
  
      For example, setting '127.0.0.1' as an allowed relay IP through the GUI would generate
      an actual relay IP list similar to the following:
  
      .. code-block:: cfg
  
          ['24.0.0.128', '32.0.0.128', '60.0.0.128', '68.0.0.128', '1.0.0.0', '76.0.0.0',
           '0.0.0.0', '0.0.0.0', '1.0.0.0', '1.0.0.0', '2.0.0.0', '2.0.0.0', '4.0.0.0',
           '0.0.0.0', '76.0.0.128', '0.0.0.0', '0.0.0.0', '0.0.0.0', '0.0.0.0',
           '255.255.255.255', '127.0.0.1']
  
      .. note::
  
          Setting the list to None corresponds to the restrictive 'Only the list below' GUI parameter
          with an empty access list configured, and setting an empty list/tuple corresponds to the
          more permissive 'All except the list below' GUI parameter.
  
      :param str addresses: A list of the relay IPs. The order of the list is important.
      :param str server: The SMTP server name.
  
      :return: A boolean representing whether the change succeeded.
      :rtype: bool
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' win_smtp_server.set_relay_ip_list addresses="['192.168.1.1', '172.16.1.1']"
      '''
      setting = 'RelayIpList'
      formatted_addresses = list()
  
      current_addresses = get_relay_ip_list(server)
  
      if list(addresses) == current_addresses:
          _LOG.debug('%s already contains the provided addresses.', setting)
          return True
  
      if addresses:
          # The WMI input data needs to be in the format used by RelayIpList. Order
          # is also important due to the way RelayIpList orders the address list.
  
          if addresses[0] is None:
              formatted_addresses = None
          else:
              for address in addresses:
                  for octet in address.split('.'):
                      formatted_addresses.append(octet)
  
      _LOG.debug('Formatted %s addresses: %s', setting, formatted_addresses)
  
      _set_wmi_setting('IIsSmtpServerSetting', setting, formatted_addresses, server)
  
      new_addresses = get_relay_ip_list(server)
  
      ret = list(addresses) == new_addresses
  
      if ret:
          _LOG.debug('%s configured successfully: %s', setting, addresses)
          return ret
      _LOG.error('Unable to configure %s with value: %s', setting, addresses)
      return ret