An open relay is different from what you describe. My email account is not an open relay just because I can spam whomever I want from it, and neither is my twil

An open relay is different from what you describe. My email account is not an open relay just because I can spam whomever I want from it, and neither is my twilio account. And I don't need to send sms spam. If it was blocked on the way out, that'd be fine.