I started having this same issue today, 6/25, receiving a code 2300 after sending several text messages. I have the iPhone 14 Pro Max and I have the latest software update 16.5.1, installed on my phone. My text messages were received and I have not blocked anyone or have been blocked by anyone. They are all in my contact list. I turned my iPhone off and on to restart, but I am still having this same issue. Can someone explain how to fix this problem. Thanks.
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