I have a list of cell phone numbers and would like to begin sending the users text messages through a web form on my server.
I figure I can send messages out asking if they want to OPT-IN to my texting list by texting back "yes". What is the best way to receive their opt-in (or out) messages and parse them? Do I set up an email address just for this purpose and then somehow monitor it? How do I get a script to run every time an email comes in to figure out what is says?
I normally code in PHP, so if that's an option, that would be great. Also, since I don't know what carriers people are using, I will be sending out the message to their number at each of the major carriers. I figure I can get the carrier from the returned text message, right?