Troubleshooting

Messages sent from 10DLC source numbers are subject to the same conditions that messages sent from a short code are. However, there are a few error conditions to be aware of with 10DLC.

Generally speaking, messages sent via 10DLC will be evaluated by at least one spam filter. OpenMarket operates a spam filter and so do many US mobile operators. Response codes relating to spam are:

• 607 — The message was blocked by a spam filter
• 561 — The message was blocked by AT&T's spam filter

You cannot retry blocked messages. If you think your message was falsely flagged as spam, you should immediately submit a ticket to Support. We will investigate the message and if we conclude that it was a false-positive, we will update our filter policy. For more information on spam filtering, see What to Know About Spam Filtering.

The other error conditions you may experience relate to the limitations that may be associated with your brand and/or campaign. These limitations are the result of the vetting score you receive when you register your brand or submit your campaign. The two response codes to be aware of are:

• 541 — The message was rejected by AT&T because the TPS (transactions per second) limit on your campaign has been exceeded. You can try re-sending the message, though delivery isn't guaranteed. You may still encounter the TPS limit.
• 542 — The message was blocked by T-Mobile because the daily volume limit for your brand has been exceeded. You cannot resend the message until the next day.