I'm trying to implement Zoho Campaing in my company but my boss have few questions, I'm looking for some info but maybe you can help me faster.

Here is the point I need infos : 

I got my contacts List in campaign, they come from my CRM, I need to know if a user unsuscribe from my mailing list, can i see it in my CRM?

if a user unsuscribe from a list, does it means he will unsuscribe from all my mailing list?

Can i change my subscription address? i registred with my address to test it but i won't need it, it will be the marketing girl who'll use it, how can i change that?

and that's pretty much all the one i didn't find a solution yet.

Thanks very much for your help.

Alex