An anti-malware mobile content data management apparatus, for use in managing content data within an input electronic file containing content data to be sent over a wireless network serving at least one mobile device, comprising: at least one tokeniser to tokenise the content data contained within the input electronic file into a tagged generic representation of the content data; a content management engine to apply a predetermined content management policy to the tagged generic representation of the content data to form content-managed tagged generic content data; and a validator to create validated content-managed content data by being arranged to ensure the content-managed content data represented in the content-managed tagged generic representation conforms to any predefined limits and rules applied to each form of content data appearing in the content data of the input electronic file; wherein the validator is operably coupled to the wireless network, and arranged to output a substitute output electronic file derived from the validated content-managed content data; wherein the mobile content data management apparatus further comprises an enforcement engine operably coupled to the content management engine and arranged to provide content management policy parameters indicative of, or for use in applying, the content management policy to be in force; wherein the mobile content data management apparatus further comprises a network parameter monitor operably coupled to the enforcement engine and arranged to provide network parameters to the enforcement engine, for use in setting up or amending the content management policy parameters; and wherein the network parameter monitor is arranged to monitor the performance of communications link(s) in use on the wireless network in real time, and to adjust enforcement engine policy settings depending on the quality or performance of the communications links. at least one tokeniser to tokenise the content data contained within the input electronic file into a tagged generic representation of the content data; a content management engine to apply a predetermined content management policy to the tagged generic representation of the content data to form content-managed tagged generic content data; and a validator to create validated content-managed content data by being arranged to ensure the content-managed content data represented in the content-managed tagged generic representation conforms to any predefined limits and rules applied to each form of content data appearing in the content data of the input electronic file; wherein the validator is operably coupled to the wireless network, and arranged to output a substitute output electronic file derived from the validated content-managed content data; wherein the mobile content data management apparatus further comprises an enforcement engine operably coupled to the content management engine and arranged to provide content management policy parameters indicative of, or for use in applying, the content management policy to be in force; wherein the mobile content data management apparatus further comprises a network parameter monitor operably coupled to the enforcement engine and arranged to provide network parameters to the enforcement engine, for use in setting up or amending the content management policy parameters; and wherein the network parameter monitor is arranged to monitor the performance of communications link(s) in use on the wireless network in real time, and to adjust enforcement engine policy settings depending on the quality or performance of the communications links.