A scheme for redirecting data items to a user of a mobile data communication device that is associated with a host system and communicates therewith via a wireless network. In one embodiment, a method comprises: detecting arrival of data items for a user at the host system from one or more senders, the data items being directed to an address associated with the user at the host system; determining a delivery level provisioned for the user at the host system; and responsive to the delivery level, applying a delivery rule with respect to the data items received for the user to bundle at least a portion of the data items for transport in a single transmission to the user via the wireless network.