About opt-in e deliverability status

Hi, topliners.

I have some doubts about deliverability and opt-in/out status that I couldn't find answers in the documentation.

*Important disclaimer: I'm not trying to find a way to overcome the opt-out status of my customers, as my questions may make it seem. In fact, I'm implementing some procedures to attend new regulations and avoid changing this by mistake.

1. Suppose for the questions below that I have a customer A, with customer_id_ C, RIID_ X, e-mail address Y and cel number Z, who opted out of my e-mail communications using Responsys form provided by me.
   1. If that same email Y is assigned to another customer B, who has another RIID_, will that customer B continue to receive our promotional emails as usual? Or will the e-mail address be blocked for every customer?