The problem is, I don't know where the traffic is coming from. The email addresses seem normal and are not all from the same email service provider, but it says they are coming from a proxy server.
My open rates are trash now. About 300 subs in the past week and 3 opens.
Has anything like this happened to anyone else? Do I let the list keep growing at this rate or trash it so that I'm not charged extra for a low quality list of subscribers that I didn't even build on my own?