Error Code and Warning Dictionary

How to Prevent SMS Filtering by Carriers: Error 30007
Carrier filtering (Error 30007) occurs when messages are blocked because they appear to be unwanted, spammy, or non-compliant with carrier or legal policies...
Tue, 1 Sep, 2026 at 12:35 PM
30008: Unknown error
Error 30008 occurs when a message fails to reach the recipient, but the carrier does not provide a specific reason for the failure. Because the returned car...
Tue, 1 Sep, 2026 at 12:41 PM
30011: MMS not supported by the receiving phone number in this region
Error 30011 occurs when an MMS cannot be delivered or received because MMS is not supported for the destination number, device, or region. The exact cause d...
Tue, 1 Sep, 2026 at 12:46 PM
30023: Daily Message Cap Reached
Error 30023 occurs when the daily messaging limit for your registered Brand has been reached. Once this limit is reached, additional messages to certain ...
Tue, 1 Sep, 2026 at 12:52 PM
30032: Toll-Free Number Has Not Been Verified
Error 30032 occurs when a message is sent from a toll-free number to a recipient in the United States or Canada, but the sending number has not completed th...
Tue, 1 Sep, 2026 at 12:59 PM
21610: Attempt to send to unsubscribed recipient
Error 21610 occurs when you try to send a message to a recipient who has opted out of receiving messages or has Do Not Disturb settings enabled. Messaging r...
Tue, 1 Sep, 2026 at 1:05 PM
30033: US A2P 10DLC - Campaign Suspended
Error 30033 occurs when a message is sent from a U.S. A2P 10DLC campaign that has been suspended. While the campaign remains suspended, messages associat...
Tue, 1 Sep, 2026 at 1:10 PM
30037: Outbound Messaging Disabled
Error 30037 occurs when outbound messaging has been disabled for the account. Messages cannot be sent until the sending restriction is removed. TABLE O...
Tue, 1 Sep, 2026 at 1:14 PM
How to Fix Error 21612: Messaging Route Not Supported
Error 21612 occurs when the sending number and destination country are not compatible for messaging. This usually means the selected sender cannot be use...
Tue, 1 Sep, 2026 at 1:19 PM
Error 30034: Linking a Phone Number to Approved A2P Campaign
After your A2P brand and campaign are approved, each applicable phone number must be associated with the approved campaign before it can use the registered ...
Thu, 10 Sep, 2026 at 7:45 AM