I have a script that sends SMS alerts using email to SMS gateways like xxxxxxxxxx@txt.att.net. The number that the text appears to originate from is different every time, which prevents me from setting a custom text tone for the alerts, and also keeps the iPhone from grouping the alerts.
Anyone know of a way to control the originating phone number (or free services that will enable you to do so)?
I wound up making this work by hacking Google Voice:
http://rc3.org/2011/08/07/how-i-got-automated-texts-to-originate-from-one-number/
Not the most robust solution.