Why it occurs
This error typically indicates that the sender header being used is either blocked, not approved, or temporarily inactive as per DLT regulations. Messages cannot be sent using inactive headers.
Steps to resolve the issue
1. Verify header status on the DLT portal
– Log in to your DLT portal and check the current status of the header.
– If the header is marked as inactive or blocked, contact your DLT provider for clarification and request reactivation.
– If needed, switch to another active and approved header to proceed with message sending.
2. Contact Support if the header appears active
– If the header shows as active but the error persists, take a screenshot from the DLT portal as proof.
– Email the screenshot and a full description of the issue to [email protected].
– Include your Infobip account username and any relevant message request details for faster resolution.
