For one of my mail hosts (Liquid Web) I am able to get the full headers and when I add them I get the message from spam cop that it was processed successfully, but the new host never appears on my list of mail hosts. I have tried it multiple times with different emails from the same host - same lack of final result.
Also, just checking, I need process ONE email only from each mail host, correct? even if I have multiple emails from the same host.