Bp1421 wrote:
So what did the earlier user mean when they said that on iOS 8 it will attempt to send as iMessage but then send as a text but on iOS 9 it will look like a normal iMessage when sending but just never deliver? Sorry I have so many questions lol
I have no idea what that user meant. It doesn't correspond to anything in my experience. If you have Settings>Messages>Send as SMS enabled, when an iMessage fails to send as an iMessage, it will be tried again as an SMS. My experience is that this generally works as designed. But, again, it's not related to the person on the other end blocking you or putting you on DND.
To reiterate: There is no way, on your end, for you to tell if you have been blocked or if his phone is on DND in any fashion.