I was reading http://en.wikipedia.org/wiki/CAN-SPAM_Act_of_2003
and I understand things to a good extent. So when someone sends email to a lot of people who never opted / double opted for this newsletter, many will mark it SPAM, others will be okay with it. There is a possibility of email bouncing back from non active email boxes. And this will eventually lead to the server IP black list (I am in favour of it, the IP must be blacklisted, I'm personally against these unsolicited emails).
Okay, so my questions are
1. If someone does this, I am sure his/her server IP will be blocked and it can be checked at http://mxtoolbox.com?
2. Is there a possibility that one day his domain e.g. hisdomain.com too will be blocked?
3. What happens if a domain is blacklisted? (We assume that IP is already blacklisted and we can't change the IP)
4. Where can we check if a domain is blacklisted? (Not the IP, we assume blacklisted IP has been changed)