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frygod t1_j6i8fx5 wrote

I've written appointment reminder software that leverages one of Twilio's competitors (Signalwire) for delivery and they seem to do just fine in things like this. In testing use cases, I have to prove ownership of both sending and receiving phone number. They also require all SMS messaging campaigns to be registered as per FCC requirements. I know they filter it too, because when the FCC rule went into effect I hadn't received notification yet, and my first clue was everything suddenly showing up in the logs as being blocked.