Why it occurs
This error indicates that the header is restricted or prohibited due to one or more of the following reasons:
– Policy violations
– Non-compliance with DLT regulations
– Suspicious or flagged activity
Steps to resolve the issue
1. Verify header status on the DLT portal
– Log in to your DLT portal and check the status of the sender header.
– If the header is blacklisted, contact your DLT provider to determine the reason and request reactivation.
– If possible, switch to another approved header to continue sending messages.
2. Contact Support if the header appears active
If the header is listed as active but the error persists, take a screenshot of the header status from the DLT portal. Email the screenshot and a detailed issue description to [email protected].
Include your Infobip account username and any relevant message or header details to assist with troubleshooting.
