On Fri, 22 Mar 2002, Matti Aarnio wrote:
> On Fri, Mar 22, 2002 at 01:45:36PM -0700, Richard Gooch wrote:
> > Matti Aarnio writes:
> > > We have been dropping people because they use now dead ORBZ:
> > >
> > > Rejected - see http://orbz.org/
> > >
> > > The problem with these DNS-RBL things is that they are subject to
> > > all kinds of external pressures, and apparently ORBZ has followed
> > > ORBS in this manner.
> >
> > Interesting. When I try to lookup hosts using orbz.org, I just get
> > Non-existent host/domain results (thus mail shouldn't bounce). Why are
> > some people bouncing email?
>
> I see both DNS lookup timeouts, and SERVFAIL returns.
> In my books neither should lead to rejection, but
> a) others may have better wisdom that I have,
> b) some popular software are known to be unable to
> separate any sort of temporary failures (timeouts
> at DNS lookup) from real things (actual DNS-RBL)
Only positive lookups should lead to rejection, IMHO. Timeouts & Co.
should default to acception.
- Davide
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