ICYMI, T-Mobile announced fines on senders of spam content that went into effect in January and an update (thanks, Glenn Richards) that went into effect on March 1. This is a good call because the alternatives, either RCAs that don’t do much, or complete shut-offs that are too punitive, don’t reflect the heterogeneity of messaging use cases. The announcement is a call to all senders that they need to know their traffic and stop spam before it enters any of the carriers’ networks.
Also, to those who think that either T-Mobile may not be able to police it or that other carriers may not follow suit, you don’t want to test that theory. The cost of getting it wrong is getting kicked off the network entirely. The way these things work, one carrier takes the lead and the others follow suit. Know. Your. Traffic.