> I believe that's what SPF is supposed to solve. Sites advertise in > their DNS records which the "official" outgoing email servers are. Spammers advertise SPF records of 'the whole internet' (normally split into chunks to confuse checkers) and turning on SPF checking naïvely simply helps the spam get through. SPF also breaks forwarding in many cases and has other problems including mailing list interactions. The lack of massive uptake is not I suspect chance.. Alan -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines