Date: Wed, 26 Nov 1997 09:33:36 -0800 (PST) From: "Jonathan M. Bresler" <jmb> To: mark@grondar.za (Mark Murray) Cc: jmb@FreeBSD.ORG, mark@grondar.za, jkh@time.cdrom.com, grog@lemis.com, chat@hub.freebsd.org Subject: Re: major push by spammers? Message-ID: <199711261733.JAA03498@hub.freebsd.org> In-Reply-To: <199711261727.TAA00844@greenpeace.grondar.za> from "Mark Murray" at Nov 26, 97 07:27:22 pm
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Mark Murray wrote: > > "Jonathan M. Bresler" wrote: > > Mark Murray wrote: > > > > > > By far the mest method is Paul Vixies RBL (Realtime Blackhole List). See > > > http://maps.vix.com/rbl/ - There are some sendmail rules that work > > > really well. The cool thing is that DNS outages are failsafe. > > > > well......i have installed this on hub.freebsd.org, rou > > mailing list mail server, and have yet to see it block > > single message. now it is the last check before allowing > > the mail thru, so it seems that we are catching everything > > in RBL before we query RBL. > > The stuff in FreeBSD's sendmail rules workds well, no doubt about that, > but it is not failsafe. If your DNS is a bit slow, you can lose mail. hmm....not sure that i agree with you. if w are slow to resolve, the error code is 451, a temp error, meaning try again later. the spammers databases dont use DNS. and RBL is failsafe.....so can you explain it to me? i dont understand. jmb
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