Hi , @lmsidq
Welcome to the Community.
According to the documentation, registration is required to send text messages of any kind to U.S. customers. Carriers will block all outbound messages from unregistered phone numbers by December 1, 2024.
If you are only texting to Canadian customers, you may not experience a block, however, it's being enforced by the Carriers and it's ultimately up to them.
Experiencing SMS block from GrassHopper even though network in Canada are based on Canadian Carriers and nothing to do with Verizon/At&t/T-Mobile etc. As per discussion with TCR Support, they mentioned service provider (grasshopper) should unblock as this is not applicable.
