What happens when a Toll-Free message is identified as spam?

[Meredith_W]

Messages identified as SPAM will be rejected and error code 255 returned. Sinch continuously monitors for senders with a high number of SPAM rejections. If the SPAM message content is not resolved, the TFN is subject to blocking and deprovisioning. 

Please see our developer docs for more information on error codes. 

[#2]

Sinch Toll-Free Sender Verification ensures better deliverability for messages from your toll-free number (TFN). TFNs that are not verified are subject to rate limits and blocking towards US and Canadian carriers.

To verify your TFN, complete the Toll-Free Verified Sender Form.