Abstract: A server and/or a gateway of a computer network receive a filter for filtering data items to be sent to a mobile device of a cellular network. The mobile device is notified of receipt of data items by the server only if such notification is allowed by the filter. In one embodiment, the server maintains a first queue of data items for which notification is allowed and a second queue of data items for which notification is not allowed, and the gateway periodically inspects the first queue and notifies the mobile device of receipt of new data items.