40003 – Blocked as spam - permanent

The message was flagged by a SPAM filter and was not delivered. The originating phone number is permanently blocked.

40003 – Causes

• Certain traffic or campaigns deemed objectionable by carriers can cause a phone number to be blacklisted

40003 – Solutions

• If you feel the number was incorrectly blocked, provide examples of the messages sent to Telnyx and proof of opt-in by the recipients. After an appeals process with the carriers, the block may be lifted.