When i block someone on imessage are they gonna know that i block them?

Explanation:

When you block a contact, their texts go nowhere. The person whose number you've blocked won't receive any sign that their message to you was blocked; their text will simply sit there looking as though it were sent and not yet delivered, but in fact, it will be lost to the ether.

Yes, bc instead of ur messages being blue there gonna be green, and when they try to send u a message it won't go through at all.

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