When sending a message to a large list, it's common to have a few failed numbers. Most text messaging providers don't show this data, but we feel it's more transparent to show it, instead of just showing # of delivered messages and opt-outs.
The common reasons for failed numbers:
- Mobile number has been deactivated by their wireless carrier
- Landline number (typically from a 3rd-party integration like your ChMS or an imported file)
After 3 failed attempts, the number is automatically removed from your list. So there's nothing you need to do.
You're also not charged any message credits for failed messages.