On Fri, 18 Mar 2005 13:48:46 +0000, Duncan Hill <[EMAIL PROTECTED]> wrote: > On Friday 18 March 2005 13:09, Yang Xiao typed: > > Hi all, > > I've been noticing it lately that almost 90% of emails come in through > > our secondary MX host are spams, I just want to know if there's an > > explanation for this, my guess is that the spammers spam the secondary > > MX host intentionally for some reason I can't understand, maybe hoping > > the secondary host will configured with less care? > > In a large number of cases, the secondary MX is not configured to know the > list of valid users etc, and may be configured to pass directly to the > internal mail server, bypassing protections on the primary relay.
hm...I'd be interested to know what's the percentage is like for this kind of settings just to feed my curiousity, because it totally doesn't make sense to me , it's like settings up a secondary firewall with no blocking rules, what good is it? Yang
