In messaging compliance, it is important to remember that you are always playing defense. Setting up a compliant messaging program from the start will make sure that you don’t get dinged by the carriers in the long term. Filtering is often, though not always, driven by how customers are receiving (or not receiving) messages. If a sender is trying to message a lot of numbers that are landlines because they do not have a clear opt-in flow, the carriers will be more likely to filter. If customers ...