Morac Posted September 18, 2007 Share Posted September 18, 2007 When signing up for MailHost with my Yahoo account, SpamCop sends an email to my Yahoo address. This allows it to see where spam originates from as long as the originating user doesn't send spam from Yahoo's webmail interface. In that case there will be an entry such as the following in the headers: Received: from [XX.YY.ZZ.WWW] by web57513.mail.re1.yahoo.com via HTTP; Tue, 18 Sep 2007 10:49:45 PDT Since SpamCop didn't send email using the Yahoo web mail interface it doesn't recognize web57513.mail.re1.yahoo.com so it thinks that header is forged. So it identifies Yahoo as the sender. This is only partially correct since the actual sender is the computer located at ip address XX.YY.ZZ.WWW. XX.YY.ZZ.WWW is the actual spammer and while Yahoo can delete his account, XX.YY.ZZ.WWW can just create a new account and spam again. Reporting to XX.YY.ZZ.WWW's ISP could get XX.YY.ZZ.WWW's ISP account suspended but SpamCop doesn't do that for the reason I specified above. So basically SpamCop needs to include web######.mail.re1.yahoo.com in the domains list of Yahoo mail addresses. Link to comment Share on other sites More sharing options...
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