A text message was not delivered
When a text fails, the Inbox shows Not delivered under the message. Point to Not delivered to see the reason and the error code. Then use the table below to fix it.
Find the reason
- Open the conversation in the Inbox.
- Find the message with Not delivered.
- Point to Not delivered. A tooltip shows the reason and the error number.
To send the same text again, select Retry. Line sends it as a new message.
Reasons and fixes
| Error | What it means | What to do |
|---|---|---|
| 21610 | The recipient replied STOP. | The recipient must text START to your number. Then you can text them again. |
| 21614, 30006 | The number cannot receive texts. It can be a landline. | Call the customer, or use another channel. |
| 21211, 21421 | The number is not valid. | Check the digits and the country code. |
| 30003 | The phone is off, out of coverage or no longer active. | Try again later. |
| 30005 | The number does not exist or is no longer in use. | Ask the customer for a new number. |
| 30004, 30007 | The carrier blocked or filtered the message. | Change the wording. Do not use all capitals or many links. |
| 30001, 30008 | The carrier did not deliver it, and gave no clear reason. | Select Retry. |
| 21408 | Texts to that country are not turned on for your workspace. | Contact support@useline.io. |
The text does not send at all
Some problems stop the text before it leaves. Line then shows a message in the composer or the dialog.
"Insufficient credits". Your credit balance is too low. An Owner or Admin can buy credits in Settings > Billing & Usage.
"This looks like a landline." Line thinks the number is a UK landline. A landline usually cannot receive texts. Select Send anyway only if you are sure that the number can receive texts.
"Can't send to" a country. Texts to that country are not turned on for your workspace. Contact support@useline.io.
"No business number assigned to this account". Your workspace has no active number. Check the number status in Channels > SMS.
A picture or file did not send
Texts on UK numbers cannot carry pictures or files. Send files by email, WhatsApp or Web Chat.
Still not working
Contact support@useline.io. Include the recipient number, the time you sent the text and the error number.