Yes... After seeing Eric post this a while back, I thought about it, and it's so glaringly obvious that this works so well...
In my case, all my inbound mail comes into a group of servers, none of which should be being used by any of my users to send mail...So, anything coming into them, claiming to be from one of my users, is most likely spam... It's kind of like the old standby access lists on routers where you'd block anything coming *IN* claiming to be from your IP address range...Obviously spoofed... Michael J. Colvin NorCal Internet Services www.norcalisp.com > -----Original Message----- > From: [email protected] [mailto:spamdyke-users- > [email protected]] On Behalf Of BC > Sent: Wednesday, January 12, 2011 3:34 PM > To: [email protected] > Subject: Re: [spamdyke-users] reject-identical-sender-recipient - how, it > works? > > > kudos to Eric. He is right - it is very counter intuitive. Spamdyke > blocks 98.9% of spam and doing as Eric suggested got rid of another 1%. > > On 1/12/2011 11:00 AM, [email protected] wrote: > > Another method of rejecting this sort of spam (forged from addresses) is > > to blacklist the domains that you host. This is counter intuitive, but > > works very well. Since all of your domains' users authenticate (they all > > do authenticate, right?), they will pass spamdyke's filters, and all > > imposters will be rejected. > _______________________________________________ > spamdyke-users mailing list > [email protected] > http://www.spamdyke.org/mailman/listinfo/spamdyke-users _______________________________________________ spamdyke-users mailing list [email protected] http://www.spamdyke.org/mailman/listinfo/spamdyke-users
