63018: Rate limit exceeded for Channel

Messaging

Description

This error occurs when you send messages faster than the channel, sender, or account can process them.

Your account is sending messages faster than its available throughput. When you exceed your account-based messages-per-second (MPS) rate, Twilio begins queuing messages.
Your RCS sender exceeded the rate supported for that sender. RCS senders support 100 messages per second by default.
Your WhatsApp sender exceeded the sender throughput configured for outbound traffic. By default, each WhatsApp sender supports 80 messages per second for text or media.
Your WhatsApp business portfolio reached its messaging limit for business-initiated conversations that are outside the customer-service window. That limit is shared across senders in the same business portfolio.
Your account is sending too many messages from a single phone number to the same WhatsApp recipient.

Throttle your application so that it does not submit messages faster than the throughput available to your account or sender.
For RCS traffic, spread requests over a longer period so that the sender stays within its default 100 MPS limit and messages do not need to be queued.
For WhatsApp traffic, wait until capacity becomes available again before starting more business-initiated conversations. If your business portfolio messaging limit was reached, new conversations can start again as active conversations end.
If you need higher sustained volume, distribute traffic across multiple approved senders by using a Sender Pool or a Messaging Service sender pool where your use case supports it.
For WhatsApp text-only traffic, request higher sender throughput if your use case requires it. Media throughput cannot be increased beyond 80 MPS.
For WhatsApp, reduce how frequently you send to the same recipient to avoid triggering this error.