How many were actually "not good" versus trapped by a spam filter?

Good question. He just took off those that bounced back as undeliverable. And, frankly, I was happy to reduce the number of contacts. I went through the deleted ones to be sure they were not people I wanted to retain on the list. If they were, I tried to contact them directly. But there were very few like that.

Probably you can tell my list contained some pretty OLD contacts!