Bandwidth: SMS and MMS 10DLC Failure
Affected components: MMS Messaging (MM4)United States Messaging Services - MMS Messaging (MM4)SMS Messaging (SMPP)United States Messaging Services - SMS Messaging (SMPP)
Timeline of updates
- investigating
Bandwidth teams are investigating an incident impacting outbound 10DLC messages towards AT&T. These messages may incorrectly fail to deliver due to an off network condition labeling said messages as fraud.
- monitoring
Teams are observing expected messaging behavior and will monitor for stability.
- resolved
This incident has been resolved.
- postmortem
Between 20:20 UTC on October 7, 2026 and 20:40 UTC on October 8, 2026, outbound 10DLC SMS and MMS messages towards AT&T destinations incorrectly failed to deliver due to an off-network condition labeling the messages as fraud. Bandwidth is continuing to investigate this issue to identify all actions necessary to prevent this from recurring and will update this post with an Incident Report after investigations have concluded. We are grateful you have entrusted Bandwidth as your communication partner and we are sorry if this issue resulted in any disruption to your services.
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab).