Segment Events Not Reaching Destination
Quick answer
Check Delivery Overview first: events that arrive at the source can be filtered, blocked or failed at the destination, and some failures show no error.
Most likely fix: Open Delivery Overview
How to fix it
Try these in order — the most common fix is first.
1. Open Delivery Overview
- Go to Connections > Destinations > your destination > Delivery Overview
- Compare filtered vs failed vs successful at each step
Did this fix it?2. Check filters and mappings
- Review destination filters and Actions mapping triggers
- Use the Mapping Tester with a sample event
Did this fix it?3. Check credentials
- Re-enter API keys and reauthorize the destination
Did this fix it?4. Check device-mode requests
- In DevTools > Network, look for the destination's own outbound request
- Disable ad blockers while testing
Did this fix it?5. Contact support with an event ID
- Pass the messageId and destination name to Twilio Support
Did this fix it?
Symptoms
Events show in the source Debugger but not in the destination tool.
Why it happens
- Destination filter or mapping drops events
- Invalid credentials or rate limits at the destination
- Protocols blocking events
- Device-mode destination blocked in browser
- Event not matching an Actions destination trigger
This guide also covers
- segment destination not receiving data
- segment events missing in destination
- segment delivery overview
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