twilio sms url help

https://support.twilio.com/hc/en-us/articles/223183648-Sending-and-Receiving-Limitations-on-Calls-and-SMS-Messages

https://www.twilio.com/docs/api/messaging/message

//https://www.twilio.com/docs/guides/how-to-confirm-delivery-in-php#receive-status-events-in-your-web-application

https://support.twilio.com/hc/en-us/articles/223181708-Can-my-Twilio-SMS-messages-be-blacklisted-as-spam-

https://www.twilio.com/blog/2017/12/how-to-set-up-sms-broadcasts-in-five-minutes.html