If your messages aren’t going through, it’s usually due to a problem with the carrier or incorrect login details. Keep in mind that each country has its own messaging rules, which can also affect delivery.
If a message doesn’t appear in your outgoing report, check how the SMS was sent to help identify the issue. For detailed troubleshooting steps, refer to What to do if a message is not in my outgoing report?
Please be aware that delivery receipts may not be available in all countries.