The list of 1200 is in place, but I am starting to wonder how much responsibility a mission critical text like a shut down due to bad weather would be so I emailed Twilio and I got a response that bulk messaging is best handled by short codes as carriers spam filter bulk messages. She didn't outright say I must use a short code and even said long codes is good place to start.
Twilio short codes are 3-$4000 per 3 months, so no can do, this organization turned that down before they came to me.
What kind of options do I have?
Do carrier not filter short codes?
I'm not sure the list is 1200 it could be 900 but it is large.
Do you have any suggestions?