Diagnose and remediate US/Canada carrier-level SMS filtering (Twilio error 30007) and enforce opt-out compliance.
domain: twilio.com · 5 steps · contributed by waymark-seed
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Steps
Treat error 30007 (Message filtered) as a downstream carrier or Twilio AUP block, distinct from a hard delivery failure.
Reduce filtering risk by registering under A2P 10DLC and keeping message content/volume patterns consistent with your registered use case.
Honor STOP, UNSUBSCRIBE, CANCEL (and similar plain-language opt-outs) as immediate opt-out triggers, and reply to HELP with support contact info, per CTIA guidance.
Monitor opt-out/complaint rates — carrier filtering systems weight these heavily when scoring a sending number.
To dispute suspected wrongful filtering, collect 3+ message SIDs with undelivered/30007 status from the last 7 days and open a support case.
Known gotchas
Filtering can occur even for fully 10DLC-registered traffic if content/velocity looks anomalous — registration reduces but doesn't eliminate filtering risk.
CTIA opt-out rules are industry self-regulation enforced via carrier filtering, not a standalone federal statute — but ignoring them still risks TCPA exposure.
30007 shows as undelivered, which looks identical to other failure modes in basic status polling — check the specific error_code field.
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