A method for adapting, by a network node, a transmission mode for transmitting a content from a content server to a client, the network node comprising a database containing information about a content publication rate when new content appears at the content server on which the content is provided, the method comprising the steps of: - monitoring at least one parameter related to content transmission, wherein monitoring said at least one parameter related to content transmission comprises monitoring a success rate of at least one polling attempt of the client for retrieving the content from the content server, - determining a transmission mode adaptation based on said at least one monitored parameter related to content transmission, the transmission mode adaptation being determined taking into account the monitored success rate of the at least one polling attempt of the client, and - instructing the client how to adapt the transmission mode based on the determined transmission mode adaptation, wherein the transmission mode adaptation comprises adjusting a polling frequency of the client from a first rate to a second rate based on the monitored success rate of the at least one polling attempt of the client, wherein adjusting the polling frequency of the client comprises, after a predetermined number of consecutive polling attempts with the polling frequency of the client equal to the first rate are monitored to be negative polling attempts, adjusting the polling frequency of the client to the second rate, and wherein the transmission mode adaptation further comprises, after a predetermined number of consecutive polling attempts with the polling frequency of the client equal to the second rate are monitored to be negative polling attempts, switching to a push transmission mode. - monitoring at least one parameter related to content transmission, wherein monitoring said at least one parameter related to content transmission comprises monitoring a success rate of at least one polling attempt of the client for retrieving the content from the content server, - determining a transmission mode adaptation based on said at least one monitored parameter related to content transmission, the transmission mode adaptation being determined taking into account the monitored success rate of the at least one polling attempt of the client, and - instructing the client how to adapt the transmission mode based on the determined transmission mode adaptation, wherein the transmission mode adaptation comprises adjusting a polling frequency of the client from a first rate to a second rate based on the monitored success rate of the at least one polling attempt of the client, wherein adjusting the polling frequency of the client comprises, after a predetermined number of consecutive polling attempts with the polling frequency of the client equal to the first rate are monitored to be negative polling attempts, adjusting the polling frequency of the client to the second rate, and wherein the transmission mode adaptation further comprises, after a predetermined number of consecutive polling attempts with the polling frequency of the client equal to the second rate are monitored to be negative polling attempts, switching to a push transmission mode. wherein the transmission mode adaptation comprises adjusting a polling frequency of the client from a first rate to a second rate based on the monitored success rate of the at least one polling attempt of the client, wherein adjusting the polling frequency of the client comprises, after a predetermined number of consecutive polling attempts with the polling frequency of the client equal to the first rate are monitored to be negative polling attempts, adjusting the polling frequency of the client to the second rate, and wherein the transmission mode adaptation further comprises, after a predetermined number of consecutive polling attempts with the polling frequency of the client equal to the second rate are monitored to be negative polling attempts, switching to a push transmission mode.