2026: Recipient is blocked

HTTP status: 403.

The send was rejected because every recipient is on your blocklist. This is an HTTP 403 error. Group sends that still include at least one unblocked member are not restricted.

• List your blocked handles via GET /v3/blocked_handles and unblock the recipient with DELETE /v3/blocked_handles to send to them again
• Inbound messages from a blocked handle are dropped and produce no webhooks, so a blocked handle also explains missing inbound traffic

• Blocked Handles
• API reference: Blocked Handles
• Error Codes