Why are messages sent by others intercepted by intelligence?

Because your mobile phone has turned on smart interception mode.

When the system detects that this short message may design harassing or fraudulent content, it will intelligently intercept this short message.

Intelligent interception of mobile phone means that your mobile phone can automatically identify whether it is an advertisement or not. If it is an advertising phone number or an advertising message, it will help you intercept it, so that you will not be affected by harassing calls.