Why doesn't my iMessage filter all the unknown senders?

[iMore Question]

why doesn't my iMessage filter all the unknown senders

My iMessages won't let me filter all of my unknown senders in iOS9, how can i get it to filter all of them ?

 

[Larry Cook1]

Re: why doesn't my iMessage filter all the unknown senders

Go to settings, messages, go down to filter unknown senders and toggle it on.

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