According to some embodiments, a delivery system comprises an interface and one or more processors. The interface is operable to receive a current preference from a recipient. The current preference indicates how the recipient prefers messages to be delivered. The processors determine whether the current preference differs from a previous preference that the delivery system associates with the recipient. The interface communicates the current preference to a plurality of senders if the current preference differs from the previous preference. The senders are configured to store the current preference in local memory and to apply the current preference from local memory in response to a future determination to send a message to the recipient.