Where is Apple's setting to reject spam messages?

Methods of intercepting iPhone spam messages;

The following is an example of iPhone6.

1. Open the SMS of iPhone6, then go to the page for viewing the content of spam messages received, and then click the details in the upper right corner.

2. After entering the details, if you need to mute the notification of this conversation, just turn on the Do Not Disturb mode below (note: after turning on the Do Not Disturb mode, the SMS sent by this number can be received normally, but there will be no ringing reminder).

3. If you want to completely block this number that sends short messages and don't receive such advertising information, you can click the I icon behind the phone number, then choose to block this incoming number, and finally confirm the operation of blocking contacts (note: setting a blocked contact is equivalent to adding this number to the blacklist, and you won't receive any short messages or phone harassment from this number in the future).