Docs/TroubleshootingTroubleshootingiMessage
Why are some of my messages failing?
A handful of failures is normal messaging life. Near total failure is a different problem. Start by working out which one you are looking at.
Some messages failing
Partial failure does not mean your line is burned. Every messaging channel loses some messages, and the usual causes are boring.
| Cause | What it looks like |
|---|---|
| Invalid number | Failures cluster on specific contacts from one list or import |
| Disconnected number | The same contact fails every time you try |
| Device processing volume | Failures appear during your heaviest sending window |
| Temporary delivery issue | Failures appear briefly then stop on their own |
| Other normal delivery problems | Scattered, low, and not growing over time |
Nearly everything failing
This is the pattern that matters
What to check
Look at these together, not one at a time
- Total response rate for the line
- Today's line usage against its capacity
- How much volume you are currently pushing
- Failure rate now versus the past few days
- Whether both iMessage and SMS traffic are affected, or only one
Definitions for each of these live in Sendify analytics, and how to interpret them together is in line health.
When to contact us
Reach out if failures keep climbing after you have ruled out list quality, if a line goes from working to almost entirely failing, or if both delivery paths stop at once. Bring the numbers above with you and we can move much faster.
Still need a hand?
If your volume is going to run past the daily or hourly limits, or something is not behaving the way these docs describe, talk to our team.