Find the error
Open the conversation. A failed text has a red mark. Hover or click it to see the reason or error code.
They opted out
If it says the contact unsubscribed (code 21610), they replied STOP. Only they can undo it, by texting START to your number. Don't try to work around it.
Do Not Disturb is on
Open the contact and look at DND. If they've asked to hear from you again (for example they filled in a new form), turn DND off for SMS. A new form doesn't clear it automatically.
Carrier filtering
If it says filtered or undeliverable (code 30007), the carrier blocked it. Usual causes: link shorteners, ALL CAPS, lots of identical texts at once, or no business name. Rewrite it plainly with your business name, use your full link, and send in smaller batches.
Wallet or number
If many texts fail at once, check your wallet balance and that your number is registered.
You know why it failed and the next one gets through.
Next up
People who did this also asked
My Australian number stopped calling or texting
Since 1 July 2026 every Australian number must be linked to a registered business bundle, or it stops working.
- 1Why it happens
- 2Check your number
- 3Send revenu your details
How the wallet works
Texts, calls, email and AI are paid from a prepaid balance. Here's how it fills, drains and tops up.
- 1It's a prepaid balance
- 2What drains it fastest
- 3Auto top-up keeps it running
What makes an SMS segment (and why some texts cost more)
Texts are billed in segments. One emoji can double the cost. Here's the rule.
- 1One segment is 160 characters
- 2Longer texts split
- 3Emoji and some symbols change the rule