Re: No DNS consistency checks in Debian spam filter?
On Tue January 8 2008 10:44:06 John Hasler wrote:
> Mike Bird writes:
> > The single most powerful and most efficient spam filter test is to verify
> > DNS consistency. Judging by the spam now swamping these lists, Debian
> > does not employ such a test.
>
> Debian uses SMTP-time anti-spam methods. For a short time the list was not
> going through spamassassin but I believe that the SMTP-time stuff was still
> in effect. The problem has been fixed now, of course.
No, I checked headers during the flood. Debian was forwarding spam
directly received from hosts with PTR records without matching A records.
--Mike Bird
Reply to: