|to (str)||The destination phone number.|
|from_ (str)||The phone number sending this message (must be a verified Twilio number)|
|body (str)||The message you want to send, limited to 160 characters.|
|status_callback||A URL that Twilio will POST to when your message is processed.|
|application_sid (str)||The 34 character sid of the application Twilio should use to handle this phone call.|
Twilio will send SMS messages for long codes (in the US, a regular ten digit number) at a rate of one message per second. For additional throughput, you can use pools of numbers with Copilot or apply for a shortcode, which can send 30 messages or more per second.