Quick setup checklist
Monitor large sends and cancel queued flow starts or broadcasts when needed.
When you start a flow or send a broadcast to many contacts, messages are not delivered all at once.
- Channels send messages at a limited rate
- Messages are queued and processed over time
- Some contacts may receive messages later than others
Note: This behavior is expected and depends on your channel provider’s sending limits.
Use the Starts list to monitor flow starts that are still sending.
- Navigate to the Flows tab
- Click Starts in the left-hand sidebar
[CAPTURE: Show the Flows page with Starts selected in the sidebar.]
For flows that are still sending:
- A progress bar appears below the flow name
- The total number of contacts being started is displayed
- You can see how many contacts are still waiting to receive the flow
[CAPTURE: Show a flow start entry with an active progress bar and contact count.]
If you need to stop a flow start while it is still sending:
- Locate the flow in the Starts list
- Click the X icon at the end of the progress bar
The flow start is immediately interrupted for contacts still in the queue.
[CAPTURE: Show the progress bar with the X icon highlighted.]
Important: Only contacts who have not yet started the flow will be affected. Contacts who already entered the flow will continue as normal.
Broadcast messages follow a similar queued sending process.
To monitor broadcast progress:
- Navigate to the Broadcasts tab
- View the active broadcast’s sending progress
[CAPTURE: Show the Broadcasts tab with an active broadcast and progress indicator.]
To cancel a broadcast that is still sending:
- Click the X icon to stop the broadcast
- Send a corrected broadcast afterward if needed
Note: You cannot send another broadcast to the same group until the current one is completed or cancelled.
When you cancel a flow start or broadcast:
- Contacts who already received the message are not affected
- Contacts still in the queue will not receive the message or start the flow
- The action applies only to the remaining unsent contacts
Important limits to keep in mind:
- Messages can only be sent as fast as your channel provider allows
- If a sending queue takes more than 48 hours, it will automatically stop
- Large queues may indicate channel-level throughput limits
If sending is consistently slow, check with your service provider to confirm your channel’s rate limits.
Common Issues
I clicked X but some contacts still received the flow or broadcast
Explanation: Contacts who had already started the flow or already received the broadcast before you cancelled are not affected.
Result: Only contacts still waiting in the queue are stopped.
I can’t send a new broadcast to the same group
Cause: A broadcast to that group is still in progress.
Fix: Wait for the current broadcast to complete or cancel it using the X icon, then send the new broadcast.
Sending is extremely slow
Cause: Your channel provider may have low throughput (messages per second) or temporary congestion.
Fix: Confirm provider rate limits, reduce send size, or consider distributing sends over time.
The send stopped by itself
Cause: If a sending queue takes more than 48 hours, it automatically stops.
Fix: Split large audiences into smaller batches or confirm throughput with your provider.