On Thu, 2005-06-09 at 14:58 +1200, Jeremy Bowen wrote: > On Thursday 09 June 2005 11:20 am, Jason Haar wrote: > > Jeremy Bowen wrote: > > "ignorant mail-admins" just about defines every standard Qmail install > > out there. That's exactly what Qmail does (and Exchange BTW). > > I know Exchange does this but I wasn't aware that the default qmail > installation bounced messages. I thought the default behaviour was to accept > messages and then direct unknown addresses to a default alias. I wasn't aware > that the accepted messages were subsequently bounced :-(
Yes, qmail will always accept the email (if the destination domain is local, or we are a secondary MX, or we have been told to relay on behalf of this user. > > I agree that things like the goodrcptto patch can reduce this problem - > > but let's not forget who is really to blame here... > > I know who is to blame for that; Mail-admins who bounce messages they should > never have accepted in the first place. Well, not exactly... they obviously didn't realise that they shouldn't accept the email in the first place... > The only mitigation is to reject unknown recipients (and to try to educate > others). If your MTA cannot handle a message, it should *not* accept it. > If, for some reason, you *do* accept it, you should NEVER bounce it. In my understanding, these 'back-scatter' problems are generally caused by someone's mail server acting as an relay (open relay) when they shouldn't, or some network/server admin not dis-connecting a naughty client when they should have. These two (open relay and not dis-connecting spammers) issues are the main cause of 'back-scatter' and these days, it seems to be some random PC is infected with a virus, which then somehow sends out all the spam, complete with the fake from address.... Regards, Adam ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ Qmail-scanner-general mailing list Qmail-scanner-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/qmail-scanner-general
