When you’re receiving a Twilio error code 30003, it’s important to understand the reason for it. This code is generated when a message is undelivered. This error can be caused by many things, including an incorrect shortcode or a lack of connectivity.
First, check your billing system to make sure you’re billing correctly. The Twilio billing system works to five decimals, and any invoices will be rounded to that precision. This can result in a fractional cent mismatch. Then, check your Twilio invoice to find out what percentage of your calls are billed by destination and country. You can also view your billing adjustments and check your usage by country to see which areas are the most frequent.
The Twilio error code 30003 could be caused by a number of different reasons. For example, if you’re using a custom sender id for your message, your API callback may not work. In such a case, you might need to use third-party integration services, such as photo booth software, PBX hardware, or SBC hardware.
Another possible cause of Error 30003 could be a carrier’s filtering system. Many carriers employ message filtering systems to protect their users from abusive traffic. The filters detect messages that are too long or contain too many keywords or are otherwise objectionable. These filters can also block messages.
Once you identify the problem, you can take action to resolve it. In some cases, the error code 30003 means that the destination handset is either unreachable or is not in service. In such a case, you can try sending a test message to the user to try to figure out why the message is not being sent.