Recommendation ITU-T X.1234 (01/2022) Guidelines for countering multimedia messaging service spam Summary History FOREWORD Table of Contents Introduction 1 Scope 2 References 3 Definitions 3.1 Terms defined elsewhere 3.2 Terms defined in this Recommendation 4 Abbreviations and acronyms 5 Conventions 6 Overview 7 Scenarios and characteristic of MMS spam 8 Guidelines on the technical framework 8.1 General structure 8.2 Reference structure of MMSSIF 8.3 Functional components of MMSSIF 8.3.1 Monitor module 8.3.2 Data acquisition module 8.3.3 Preprocessing module 8.3.4 Recognition module 8.3.5 Verification module 8.3.6 Disposal module 8.3.7 System management module 8.4 Reference model 9 Work procedures 10 Guidelines on key technologies 10.1 Spam filter list 10.2 Image recognition 10.3 Text recognition 10.4 Video recognition 10.5 Audio recognition 10.6 Feedback of end users Bibliography <\pre>