On 09.07.2012, Errol Mangwiro wrote: > Recently I started receiving bounces from mail purporting to having > been sent from addresses in my domain. But the addresses don't > exist. So I thought that someone was faking the sender header and > sending spam.
Please post the _full_ header of such a mail. > I added SPF and domain-key records to try to combat this. > However, either hotmail and yahoo don't check these or they > ignore them because I'm still getting spammed. It's trivial to fake any From: header, and there's nothing you can do about that, unfortunately. > Does anyone know of a way I can tighten fake sender policies & prevent this > from occuring again? You can't prevent people from faking the From: header. Any spamfilter or network admin who tags email as spam according to From: is a moron. The correct way is to see if all these spam-emails originate from the same server, and send the admin an epost. To do this, a look at the complete and original header of one of those spammails is neccessary. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
