I got around 100 junk email per day. I used Yahoo Mail Plus. They got a very good spam filter. Almost of spam are gone. Even one or two spam can escape from the filter, I may read those. But I never response them. I read the first sentence, then I know this is spam and delete it. I don't know why they are still sending out those email. This is only wasting their network resources. A person told me they are sending millions email per day. If there are 0.1% people response them, they will have a thousand customers. I still have some doubts about that.