Typically, the "Message Blocking Is Active" reply indicates that your carrier has temporarily disabled SMS functionality on your account.

Some have it that they’re unable to send or receive SMS or text messages after installing the latest Android update. Why do these things happen and what should be done as remedy?

Solution 2: Soft reset your Samsung Galaxy Z Fold 4 The next thing you should do when you are unable to send or receive text messages using your Galaxy phone is a soft reset.

Since the official release of Android Oreo, a number of Pixel users have been reporting that they have stopped receiving text messages. The bug allows them to send messages, but no incoming texts ...