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From: "Jonathan M. Bresler" <jmb>
Message-Id: <199711261733.JAA03498@hub.freebsd.org>
Subject: Re: major push by spammers?
To: mark@grondar.za (Mark Murray)
Date: Wed, 26 Nov 1997 09:33:36 -0800 (PST)
Cc: jmb@FreeBSD.ORG, mark@grondar.za, jkh@time.cdrom.com, grog@lemis.com,
        chat@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