Any spam filter like

Thanks Dustin. I am aware that Cox has a spam blocker on by default (correct me if I'm wrong that it's active by default). However, it is very ineffective. The vast majority of spam comes straight to my inbox while legitimate emails are sometimes flagged as spam. That is why I am interested in a solution like Earthlink's, where all messages are blocked by default and the sender is presented with an option to request to be added to the recipient's trusted senders list, thus allowing that message and all future messages to be forwarded through. Thanks anyways.