I am not able to configure a new mailhost. I think it is a parsing problem. I copied the raw source of the e-mail sent by SpamCop to the mailhost configuration form. SpamCop says: However the headers contain: Received: from [18.104.22.168] by spamcop.net with HTTP; Fri, 13 Dec 2013 19:17:33 GMT after the above address. Is this a SpamCop address? Is there a better way to configure a mailhost?