If your product sends SMS through Twilio in the United States, there's a Messaging Service campaign registered against your A2P 10DLC brand. On June 30, 2026, two new fields become required on every campaign registration: PrivacyPolicyUrl and TermsAndConditionsUrl. Submissions without them will return a hard 400 from Twilio. This is the kind of change that doesn't break anything — until it does. Existing campaigns keep delivering messages. New campaigns and any update to a campaign hit the new...