30017: Carrier network congestion

This error indicates that the downstream carrier is experiencing high MMS traffic and isn't accepting the message request. The request is retried during temporary carrier congestion and 30017 is returned if the carrier still doesn't accept it.

• The downstream carrier is experiencing congestion in MMS traffic.
• Your application is sending MMS traffic in bursts during a period when carrier MMS capacity is constrained.

• Send messages over a longer period of time instead of sending large bursts.
• If the traffic isn't time-sensitive, schedule messages with ScheduleType and SendAt to spread delivery more evenly.
• Review your MMS throughput and queueing strategy for the account and sender types you use so peak traffic doesn't add avoidable burst pressure.
• If you send high-volume messaging traffic, consider Traffic Shaping to prioritize critical messages and reduce sender-level congestion inside your messaging flow.

• Account Based Throughput Overview
• Traffic Shaping
• Message Scheduling