If I block someone, will they know it? ..And are their iMessages still retrievable?

[Chapman919]

Nope.

But it still says delivered on my end if they blocked me? Nothing is coming up on there’s.

 

[Gelatin52]

Their should be a SMS bounce back to alert the sender their message didn't get through. As it stands, senders think their messages arrive

I wouldn’t want my “blockees” to know I blocked them.