Best way to contact legitimate users by email

I'm trying to clean up my WP site so that I can use it for marketing information related to what I blog about. I thought that I could take advantage of the emails of every account as one means of marketing. But I need to find a way to clean things up. I was hoping on depending upon the Wang plugin service to do this, but found out that this service was recently stopped.

So now this is what I'd like help doing:
1) Export entire list of users to a file (maybe Excel, CSV or plain text
2) Filter out fake looking or suspicious email addresses and mark them as suspected SPAM accounts
3) Somehow use this list to bulk mark suspected accounts for deletion.

Can you help?